app/__init__.py

@@ -185,14 +185,12 @@ def create_ui_app(test_config: Optional[Dict[str, Any]] = None) -> Flask:
 
 def _configure_cors(app: Flask) -> None:
     origins = app.config.get("CORS_ORIGINS", ["*"])
-    methods = app.config.get("CORS_METHODS", ["GET", "PUT", "POST", "DELETE", "OPTIONS"])
-    allow_headers = app.config.get(
-        "CORS_ALLOW_HEADERS",
-        ["Content-Type", "X-Access-Key", "X-Secret-Key", "X-Amz-Date", "X-Amz-SignedHeaders"],
-    )
+    methods = app.config.get("CORS_METHODS", ["GET", "PUT", "POST", "DELETE", "OPTIONS", "HEAD"])
+    allow_headers = app.config.get("CORS_ALLOW_HEADERS", ["*"])
+    expose_headers = app.config.get("CORS_EXPOSE_HEADERS", ["*"])
     CORS(
         app,
-        resources={r"/*": {"origins": origins, "methods": methods, "allow_headers": allow_headers}},
+        resources={r"/*": {"origins": origins, "methods": methods, "allow_headers": allow_headers, "expose_headers": expose_headers}},
         supports_credentials=True,
     )
 

app/config.py

@@ -59,6 +59,7 @@ class AppConfig:
     cors_origins: list[str]
     cors_methods: list[str]
     cors_allow_headers: list[str]
+    cors_expose_headers: list[str]
     session_lifetime_days: int
     auth_max_attempts: int
     auth_lockout_minutes: int
@@ -148,18 +149,9 @@ class AppConfig:
             return parts or default
 
         cors_origins = _csv(str(_get("CORS_ORIGINS", "*")), ["*"])
-        cors_methods = _csv(str(_get("CORS_METHODS", "GET,PUT,POST,DELETE,OPTIONS")), ["GET", "PUT", "POST", "DELETE", "OPTIONS"])
-        cors_allow_headers = _csv(str(_get("CORS_ALLOW_HEADERS", "Content-Type,X-Access-Key,X-Secret-Key,X-Amz-Algorithm,X-Amz-Credential,X-Amz-Date,X-Amz-Expires,X-Amz-SignedHeaders,X-Amz-Signature")), [
-            "Content-Type",
-            "X-Access-Key",
-            "X-Secret-Key",
-            "X-Amz-Algorithm",
-            "X-Amz-Credential",
-            "X-Amz-Date",
-            "X-Amz-Expires",
-            "X-Amz-SignedHeaders",
-            "X-Amz-Signature",
-        ])
+        cors_methods = _csv(str(_get("CORS_METHODS", "GET,PUT,POST,DELETE,OPTIONS,HEAD")), ["GET", "PUT", "POST", "DELETE", "OPTIONS", "HEAD"])
+        cors_allow_headers = _csv(str(_get("CORS_ALLOW_HEADERS", "*")), ["*"])
+        cors_expose_headers = _csv(str(_get("CORS_EXPOSE_HEADERS", "*")), ["*"])
         session_lifetime_days = int(_get("SESSION_LIFETIME_DAYS", 30))
         bucket_stats_cache_ttl = int(_get("BUCKET_STATS_CACHE_TTL", 60))  # Default 60 seconds
         
@@ -191,6 +183,7 @@ class AppConfig:
                    cors_origins=cors_origins,
                    cors_methods=cors_methods,
                    cors_allow_headers=cors_allow_headers,
+                   cors_expose_headers=cors_expose_headers,
                    session_lifetime_days=session_lifetime_days,
                    auth_max_attempts=auth_max_attempts,
                    auth_lockout_minutes=auth_lockout_minutes,
@@ -234,6 +227,7 @@ class AppConfig:
             "CORS_ORIGINS": self.cors_origins,
             "CORS_METHODS": self.cors_methods,
             "CORS_ALLOW_HEADERS": self.cors_allow_headers,
+            "CORS_EXPOSE_HEADERS": self.cors_expose_headers,
             "SESSION_LIFETIME_DAYS": self.session_lifetime_days,
             "ENCRYPTION_ENABLED": self.encryption_enabled,
             "ENCRYPTION_MASTER_KEY_PATH": str(self.encryption_master_key_path),

app/ui.py

@@ -1505,6 +1505,9 @@ def metrics_dashboard():
         flash("Access denied: Metrics require admin permissions", "danger")
         return redirect(url_for("ui.buckets_overview"))
     
+    from app.version import APP_VERSION
+    import time
+    
     cpu_percent = psutil.cpu_percent(interval=0.1)
     memory = psutil.virtual_memory()
     
@@ -1527,6 +1530,11 @@ def metrics_dashboard():
         total_objects += stats.get("total_objects", stats.get("objects", 0))
         total_bytes_used += stats.get("total_bytes", stats.get("bytes", 0))
         total_versions += stats.get("version_count", 0)
+    
+    # Calculate system uptime
+    boot_time = psutil.boot_time()
+    uptime_seconds = time.time() - boot_time
+    uptime_days = int(uptime_seconds / 86400)
         
     return render_template(
         "metrics.html",
@@ -1550,6 +1558,8 @@ def metrics_dashboard():
             "versions": total_versions,
             "storage_used": _format_bytes(total_bytes_used),
             "storage_raw": total_bytes_used,
+            "version": APP_VERSION,
+            "uptime_days": uptime_days,
         }
     )
 

app/version.py

@@ -1,7 +1,7 @@
 """Central location for the application version string."""
 from __future__ import annotations
 
-APP_VERSION = "0.1.3"
+APP_VERSION = "0.1.4"
 
 
 def get_version() -> str:

docs.md

@@ -69,23 +69,97 @@ The repo now tracks a human-friendly release string inside `app/version.py` (see
 
 ## 3. Configuration Reference
 
+All configuration is done via environment variables. The table below lists every supported variable.
+
+### Core Settings
+
 | Variable | Default | Notes |
 | --- | --- | --- |
 | `STORAGE_ROOT` | `<repo>/data` | Filesystem home for all buckets/objects. |
-| `MAX_UPLOAD_SIZE` | `1073741824` | Bytes. Caps incoming uploads in both API + UI. |
+| `MAX_UPLOAD_SIZE` | `1073741824` (1 GiB) | Bytes. Caps incoming uploads in both API + UI. |
 | `UI_PAGE_SIZE` | `100` | `MaxKeys` hint shown in listings. |
-| `SECRET_KEY` | `dev-secret-key` | Flask session key for UI auth. |
-| `IAM_CONFIG` | `<repo>/data/.myfsio.sys/config/iam.json` | Stores users, secrets, and inline policies. |
-| `BUCKET_POLICY_PATH` | `<repo>/data/.myfsio.sys/config/bucket_policies.json` | Bucket policy store (auto hot-reload). |
-| `API_BASE_URL` | `None` | Used by the UI to hit API endpoints (presign/policy). If unset, the UI will auto-detect the host or use `X-Forwarded-*` headers. |
+| `SECRET_KEY` | Auto-generated | Flask session key. Auto-generates and persists if not set. **Set explicitly in production.** |
+| `API_BASE_URL` | `None` | Public URL for presigned URLs. Required behind proxies. |
 | `AWS_REGION` | `us-east-1` | Region embedded in SigV4 credential scope. |
 | `AWS_SERVICE` | `s3` | Service string for SigV4. |
-| `ENCRYPTION_ENABLED` | `false` | Enable server-side encryption support. |
-| `KMS_ENABLED` | `false` | Enable KMS key management for encryption. |
-| `KMS_KEYS_PATH` | `data/kms_keys.json` | Path to store KMS key metadata. |
-| `ENCRYPTION_MASTER_KEY_PATH` | `data/master.key` | Path to the master encryption key file. |
 
-Set env vars (or pass overrides to `create_app`) to point the servers at custom paths.
+### IAM & Security
+
+| Variable | Default | Notes |
+| --- | --- | --- |
+| `IAM_CONFIG` | `data/.myfsio.sys/config/iam.json` | Stores users, secrets, and inline policies. |
+| `BUCKET_POLICY_PATH` | `data/.myfsio.sys/config/bucket_policies.json` | Bucket policy store (auto hot-reload). |
+| `AUTH_MAX_ATTEMPTS` | `5` | Failed login attempts before lockout. |
+| `AUTH_LOCKOUT_MINUTES` | `15` | Lockout duration after max failed attempts. |
+| `SESSION_LIFETIME_DAYS` | `30` | How long UI sessions remain valid. |
+| `SECRET_TTL_SECONDS` | `300` | TTL for ephemeral secrets (presigned URLs). |
+| `UI_ENFORCE_BUCKET_POLICIES` | `false` | Whether the UI should enforce bucket policies. |
+
+### CORS (Cross-Origin Resource Sharing)
+
+| Variable | Default | Notes |
+| --- | --- | --- |
+| `CORS_ORIGINS` | `*` | Comma-separated allowed origins. Use specific domains in production. |
+| `CORS_METHODS` | `GET,PUT,POST,DELETE,OPTIONS,HEAD` | Allowed HTTP methods. |
+| `CORS_ALLOW_HEADERS` | `*` | Allowed request headers. |
+| `CORS_EXPOSE_HEADERS` | `*` | Response headers visible to browsers (e.g., `ETag`). |
+
+### Rate Limiting
+
+| Variable | Default | Notes |
+| --- | --- | --- |
+| `RATE_LIMIT_DEFAULT` | `200 per minute` | Default rate limit for API endpoints. |
+| `RATE_LIMIT_STORAGE_URI` | `memory://` | Storage backend for rate limits. Use `redis://host:port` for distributed setups. |
+
+### Logging
+
+| Variable | Default | Notes |
+| --- | --- | --- |
+| `LOG_LEVEL` | `INFO` | Log verbosity: `DEBUG`, `INFO`, `WARNING`, `ERROR`. |
+| `LOG_TO_FILE` | `true` | Enable file logging. |
+| `LOG_DIR` | `<repo>/logs` | Directory for log files. |
+| `LOG_FILE` | `app.log` | Log filename. |
+| `LOG_MAX_BYTES` | `5242880` (5 MB) | Max log file size before rotation. |
+| `LOG_BACKUP_COUNT` | `3` | Number of rotated log files to keep. |
+
+### Encryption
+
+| Variable | Default | Notes |
+| --- | --- | --- |
+| `ENCRYPTION_ENABLED` | `false` | Enable server-side encryption support. |
+| `ENCRYPTION_MASTER_KEY_PATH` | `data/.myfsio.sys/keys/master.key` | Path to the master encryption key file. |
+| `DEFAULT_ENCRYPTION_ALGORITHM` | `AES256` | Default algorithm for new encrypted objects. |
+| `KMS_ENABLED` | `false` | Enable KMS key management for encryption. |
+| `KMS_KEYS_PATH` | `data/.myfsio.sys/keys/kms_keys.json` | Path to store KMS key metadata. |
+
+### Performance Tuning
+
+| Variable | Default | Notes |
+| --- | --- | --- |
+| `STREAM_CHUNK_SIZE` | `65536` (64 KB) | Chunk size for streaming large files. |
+| `MULTIPART_MIN_PART_SIZE` | `5242880` (5 MB) | Minimum part size for multipart uploads. |
+| `BUCKET_STATS_CACHE_TTL` | `60` | Seconds to cache bucket statistics. |
+| `BULK_DELETE_MAX_KEYS` | `500` | Maximum keys per bulk delete request. |
+
+### Server Settings
+
+| Variable | Default | Notes |
+| --- | --- | --- |
+| `APP_HOST` | `0.0.0.0` | Network interface to bind to. |
+| `APP_PORT` | `5000` | API server port (UI uses 5100). |
+| `FLASK_DEBUG` | `0` | Enable Flask debug mode. **Never enable in production.** |
+
+### Production Checklist
+
+Before deploying to production, ensure you:
+
+1. **Set `SECRET_KEY`** - Use a strong, unique value (e.g., `openssl rand -base64 32`)
+2. **Restrict CORS** - Set `CORS_ORIGINS` to your specific domains instead of `*`
+3. **Configure `API_BASE_URL`** - Required for correct presigned URLs behind proxies
+4. **Enable HTTPS** - Use a reverse proxy (nginx, Cloudflare) with TLS termination
+5. **Review rate limits** - Adjust `RATE_LIMIT_DEFAULT` based on your needs
+6. **Secure master keys** - Back up `ENCRYPTION_MASTER_KEY_PATH` if using encryption
+7. **Use `--prod` flag** - Runs with Waitress instead of Flask dev server
 
 ### Proxy Configuration
 
@@ -95,6 +169,333 @@ If running behind a reverse proxy (e.g., Nginx, Cloudflare, or a tunnel), ensure
 
 The application automatically trusts these headers to generate correct presigned URLs (e.g., `https://s3.example.com/...` instead of `http://127.0.0.1:5000/...`). Alternatively, you can explicitly set `API_BASE_URL` to your public endpoint.
 
+## 4. Upgrading and Updates
+
+### Version Checking
+
+The application version is tracked in `app/version.py` and exposed via:
+- **Health endpoint:** `GET /healthz` returns JSON with `version` field
+- **Metrics dashboard:** Navigate to `/ui/metrics` to see the running version in the System Status card
+
+To check your current version:
+
+```bash
+# API health endpoint
+curl http://localhost:5000/healthz
+
+# Or inspect version.py directly
+cat app/version.py | grep APP_VERSION
+```
+
+### Pre-Update Backup Procedures
+
+**Always backup before upgrading to prevent data loss:**
+
+```bash
+# 1. Stop the application
+# Ctrl+C if running in terminal, or:
+docker stop myfsio  # if using Docker
+
+# 2. Backup configuration files (CRITICAL)
+mkdir -p backups/$(date +%Y%m%d_%H%M%S)
+cp -r data/.myfsio.sys/config backups/$(date +%Y%m%d_%H%M%S)/
+
+# 3. Backup all data (optional but recommended)
+tar -czf backups/data_$(date +%Y%m%d_%H%M%S).tar.gz data/
+
+# 4. Backup logs for audit trail
+cp -r logs backups/$(date +%Y%m%d_%H%M%S)/
+```
+
+**Windows PowerShell:**
+
+```powershell
+# Create timestamped backup
+$timestamp = Get-Date -Format "yyyyMMdd_HHmmss"
+New-Item -ItemType Directory -Path "backups\$timestamp" -Force
+
+# Backup configs
+Copy-Item -Recurse "data\.myfsio.sys\config" "backups\$timestamp\"
+
+# Backup entire data directory
+Compress-Archive -Path "data\" -DestinationPath "backups\data_$timestamp.zip"
+```
+
+**Critical files to backup:**
+- `data/.myfsio.sys/config/iam.json` – User accounts and access keys
+- `data/.myfsio.sys/config/bucket_policies.json` – Bucket access policies
+- `data/.myfsio.sys/config/kms_keys.json` – Encryption keys (if using KMS)
+- `data/.myfsio.sys/config/secret_store.json` – Application secrets
+
+### Update Procedures
+
+#### Source Installation Updates
+
+```bash
+# 1. Backup (see above)
+# 2. Pull latest code
+git fetch origin
+git checkout main  # or your target branch/tag
+git pull
+
+# 3. Check for dependency changes
+pip install -r requirements.txt
+
+# 4. Review CHANGELOG/release notes for breaking changes
+cat CHANGELOG.md  # if available
+
+# 5. Run migration scripts (if any)
+# python scripts/migrate_vX_to_vY.py  # example
+
+# 6. Restart application
+python run.py
+```
+
+#### Docker Updates
+
+```bash
+# 1. Backup (see above)
+# 2. Pull/rebuild image
+docker pull yourregistry/myfsio:latest
+# OR rebuild from source:
+docker build -t myfsio:latest .
+
+# 3. Stop and remove old container
+docker stop myfsio
+docker rm myfsio
+
+# 4. Start new container with same volumes
+docker run -d \
+  --name myfsio \
+  -p 5000:5000 -p 5100:5100 \
+  -v "$(pwd)/data:/app/data" \
+  -v "$(pwd)/logs:/app/logs" \
+  -e SECRET_KEY="your-secret" \
+  myfsio:latest
+
+# 5. Verify health
+curl http://localhost:5000/healthz
+```
+
+### Version Compatibility Checks
+
+Before upgrading across major versions, verify compatibility:
+
+| From Version | To Version | Breaking Changes | Migration Required |
+|--------------|------------|------------------|-------------------|
+| 0.1.x | 0.2.x | None expected | No |
+| < 0.1.0 | >= 0.1.0 | New IAM config format | Yes - run migration script |
+
+**Automatic compatibility detection:**
+
+The application will log warnings on startup if config files need migration:
+
+```
+WARNING: IAM config format is outdated (v1). Please run: python scripts/migrate_iam.py
+```
+
+**Manual compatibility check:**
+
+```bash
+# Compare version schemas
+python -c "from app.version import APP_VERSION; print(f'Running: {APP_VERSION}')"
+python scripts/check_compatibility.py data/.myfsio.sys/config/
+```
+
+### Migration Steps for Breaking Changes
+
+When release notes indicate breaking changes, follow these steps:
+
+#### Config Format Migrations
+
+```bash
+# 1. Backup first (critical!)
+cp data/.myfsio.sys/config/iam.json data/.myfsio.sys/config/iam.json.backup
+
+# 2. Run provided migration script
+python scripts/migrate_iam_v1_to_v2.py
+
+# 3. Validate migration
+python scripts/validate_config.py
+
+# 4. Test with read-only mode first (if available)
+# python run.py --read-only
+
+# 5. Restart normally
+python run.py
+```
+
+#### Database/Storage Schema Changes
+
+If object metadata format changes:
+
+```bash
+# 1. Run storage migration script
+python scripts/migrate_storage.py --dry-run  # preview changes
+
+# 2. Apply migration
+python scripts/migrate_storage.py --apply
+
+# 3. Verify integrity
+python scripts/verify_storage.py
+```
+
+#### IAM Policy Updates
+
+If IAM action names change (e.g., `s3:Get` → `s3:GetObject`):
+
+```bash
+# Migration script will update all policies
+python scripts/migrate_policies.py \
+  --input data/.myfsio.sys/config/iam.json \
+  --backup data/.myfsio.sys/config/iam.json.v1
+
+# Review changes before committing
+python scripts/diff_policies.py \
+  data/.myfsio.sys/config/iam.json.v1 \
+  data/.myfsio.sys/config/iam.json
+```
+
+### Rollback Procedures
+
+If an update causes issues, rollback to the previous version:
+
+#### Quick Rollback (Source)
+
+```bash
+# 1. Stop application
+# Ctrl+C or kill process
+
+# 2. Revert code
+git checkout <previous-version-tag>
+# OR
+git reset --hard HEAD~1
+
+# 3. Restore configs from backup
+cp backups/20241213_103000/config/* data/.myfsio.sys/config/
+
+# 4. Downgrade dependencies if needed
+pip install -r requirements.txt
+
+# 5. Restart
+python run.py
+```
+
+#### Docker Rollback
+
+```bash
+# 1. Stop current container
+docker stop myfsio
+docker rm myfsio
+
+# 2. Start previous version
+docker run -d \
+  --name myfsio \
+  -p 5000:5000 -p 5100:5100 \
+  -v "$(pwd)/data:/app/data" \
+  -v "$(pwd)/logs:/app/logs" \
+  -e SECRET_KEY="your-secret" \
+  myfsio:0.1.3  # specify previous version tag
+
+# 3. Verify
+curl http://localhost:5000/healthz
+```
+
+#### Emergency Config Restore
+
+If only config is corrupted but code is fine:
+
+```bash
+# Stop app
+# Restore from latest backup
+cp backups/20241213_103000/config/iam.json data/.myfsio.sys/config/
+cp backups/20241213_103000/config/bucket_policies.json data/.myfsio.sys/config/
+
+# Restart app
+python run.py
+```
+
+### Blue-Green Deployment (Zero Downtime)
+
+For production environments requiring zero downtime:
+
+```bash
+# 1. Run new version on different port (e.g., 5001/5101)
+APP_PORT=5001 UI_PORT=5101 python run.py &
+
+# 2. Health check new instance
+curl http://localhost:5001/healthz
+
+# 3. Update load balancer to route to new ports
+
+# 4. Monitor for issues
+
+# 5. Gracefully stop old instance
+kill -SIGTERM <old-pid>
+```
+
+### Post-Update Verification
+
+After any update, verify functionality:
+
+```bash
+# 1. Health check
+curl http://localhost:5000/healthz
+
+# 2. Login to UI
+open http://localhost:5100/ui
+
+# 3. Test IAM authentication
+curl -H "X-Amz-Security-Token: <your-access-key>:<your-secret>" \
+  http://localhost:5000/
+
+# 4. Test presigned URL generation
+# Via UI or API
+
+# 5. Check logs for errors
+tail -n 100 logs/myfsio.log
+```
+
+### Automated Update Scripts
+
+Create a custom update script for your environment:
+
+```bash
+#!/bin/bash
+# update.sh - Automated update with rollback capability
+
+set -e  # Exit on error
+
+VERSION_NEW="$1"
+BACKUP_DIR="backups/$(date +%Y%m%d_%H%M%S)"
+
+echo "Creating backup..."
+mkdir -p "$BACKUP_DIR"
+cp -r data/.myfsio.sys/config "$BACKUP_DIR/"
+
+echo "Updating to version $VERSION_NEW..."
+git fetch origin
+git checkout "v$VERSION_NEW"
+pip install -r requirements.txt
+
+echo "Starting application..."
+python run.py &
+APP_PID=$!
+
+# Wait and health check
+sleep 5
+if curl -f http://localhost:5000/healthz; then
+  echo "Update successful!"
+else
+  echo "Health check failed, rolling back..."
+  kill $APP_PID
+  git checkout -
+  cp -r "$BACKUP_DIR/config/*" data/.myfsio.sys/config/
+  python run.py &
+  exit 1
+fi
+```
+
 ## 4. Authentication & IAM
 
 1. On first boot, `data/.myfsio.sys/config/iam.json` is seeded with `localadmin / localadmin` that has wildcard access.
@@ -577,9 +978,3 @@ DELETE /bucket-policy/<bucket>          # Delete policy
 GET    /<bucket>?quota                  # Get bucket quota
 PUT    /<bucket>?quota                  # Set bucket quota (admin only)
 ```
-
-## 14. Next Steps
-
-- Tailor IAM + policy JSON files for team-ready presets.
-- Wrap `run_api.py` with gunicorn or another WSGI server for long-running workloads.
-- Extend `bucket_policies.json` to cover Deny statements that simulate production security controls.

templates/docs.html

@@ -55,8 +55,8 @@ python run.py --mode ui
             <tbody>
               <tr>
                 <td><code>API_BASE_URL</code></td>
-                <td><code>http://127.0.0.1:5000</code></td>
-                <td>The public URL of the API. <strong>Required</strong> if running behind a proxy or if the UI and API are on different domains. Ensures presigned URLs are generated correctly.</td>
+                <td><code>None</code></td>
+                <td>The public URL of the API. <strong>Required</strong> if running behind a proxy. Ensures presigned URLs are generated correctly.</td>
               </tr>
               <tr>
                 <td><code>STORAGE_ROOT</code></td>
@@ -65,13 +65,13 @@ python run.py --mode ui
               </tr>
               <tr>
                 <td><code>MAX_UPLOAD_SIZE</code></td>
-                <td><code>5 GB</code></td>
-                <td>Max request body size.</td>
+                <td><code>1 GB</code></td>
+                <td>Max request body size in bytes.</td>
               </tr>
               <tr>
                 <td><code>SECRET_KEY</code></td>
-                <td>(Random)</td>
-                <td>Flask session key. Set this in production.</td>
+                <td>(Auto-generated)</td>
+                <td>Flask session key. Auto-generates if not set. <strong>Set explicitly in production.</strong></td>
               </tr>
               <tr>
                 <td><code>APP_HOST</code></td>
@@ -81,7 +81,51 @@ python run.py --mode ui
               <tr>
                 <td><code>APP_PORT</code></td>
                 <td><code>5000</code></td>
-                <td>Listen port.</td>
+                <td>Listen port (UI uses 5100).</td>
+              </tr>
+              <tr class="table-secondary">
+                <td colspan="3" class="fw-semibold">CORS Settings</td>
+              </tr>
+              <tr>
+                <td><code>CORS_ORIGINS</code></td>
+                <td><code>*</code></td>
+                <td>Allowed origins. <strong>Restrict in production.</strong></td>
+              </tr>
+              <tr>
+                <td><code>CORS_METHODS</code></td>
+                <td><code>GET,PUT,POST,DELETE,OPTIONS,HEAD</code></td>
+                <td>Allowed HTTP methods.</td>
+              </tr>
+              <tr>
+                <td><code>CORS_ALLOW_HEADERS</code></td>
+                <td><code>*</code></td>
+                <td>Allowed request headers.</td>
+              </tr>
+              <tr>
+                <td><code>CORS_EXPOSE_HEADERS</code></td>
+                <td><code>*</code></td>
+                <td>Response headers visible to browsers (e.g., <code>ETag</code>).</td>
+              </tr>
+              <tr class="table-secondary">
+                <td colspan="3" class="fw-semibold">Security Settings</td>
+              </tr>
+              <tr>
+                <td><code>AUTH_MAX_ATTEMPTS</code></td>
+                <td><code>5</code></td>
+                <td>Failed login attempts before lockout.</td>
+              </tr>
+              <tr>
+                <td><code>AUTH_LOCKOUT_MINUTES</code></td>
+                <td><code>15</code></td>
+                <td>Lockout duration after max failed attempts.</td>
+              </tr>
+              <tr>
+                <td><code>RATE_LIMIT_DEFAULT</code></td>
+                <td><code>200 per minute</code></td>
+                <td>Default API rate limit.</td>
+              </tr>
+              <tr class="table-secondary">
+                <td colspan="3" class="fw-semibold">Encryption Settings</td>
               </tr>
               <tr>
                 <td><code>ENCRYPTION_ENABLED</code></td>
@@ -93,9 +137,25 @@ python run.py --mode ui
                 <td><code>false</code></td>
                 <td>Enable KMS key management for encryption.</td>
               </tr>
+              <tr class="table-secondary">
+                <td colspan="3" class="fw-semibold">Logging Settings</td>
+              </tr>
+              <tr>
+                <td><code>LOG_LEVEL</code></td>
+                <td><code>INFO</code></td>
+                <td>Log verbosity: DEBUG, INFO, WARNING, ERROR.</td>
+              </tr>
+              <tr>
+                <td><code>LOG_TO_FILE</code></td>
+                <td><code>true</code></td>
+                <td>Enable file logging.</td>
+              </tr>
             </tbody>
           </table>
         </div>
+        <div class="alert alert-warning mt-3 mb-0 small">
+          <strong>Production Checklist:</strong> Set <code>SECRET_KEY</code>, restrict <code>CORS_ORIGINS</code>, configure <code>API_BASE_URL</code>, enable HTTPS via reverse proxy, and use <code>--prod</code> flag.
+        </div>
       </div>
     </article>
     <article id="background" class="card shadow-sm docs-section">

templates/metrics.html

@@ -126,7 +126,6 @@
     <div class="card shadow-sm border-0">
       <div class="card-header bg-transparent border-0 pt-4 px-4 d-flex justify-content-between align-items-center">
         <h5 class="card-title mb-0 fw-semibold">System Overview</h5>
-        <span class="badge bg-primary-subtle text-primary">Live</span>
       </div>
       <div class="card-body p-4">
         <div class="table-responsive">
@@ -233,14 +232,14 @@
             <svg xmlns="http://www.w3.org/2000/svg" width="14" height="14" fill="currentColor" class="bi bi-check-circle-fill me-1" viewBox="0 0 16 16">
               <path d="M16 8A8 8 0 1 1 0 8a8 8 0 0 1 16 0zm-3.97-3.03a.75.75 0 0 0-1.08.022L7.477 9.417 5.384 7.323a.75.75 0 0 0-1.06 1.06L6.97 11.03a.75.75 0 0 0 1.079-.02l3.992-4.99a.75.75 0 0 0-.01-1.05z"/>
             </svg>
-            Healthy
+            v{{ app.version }}
           </span>
         </div>
         <h4 class="card-title fw-bold mb-3">System Status</h4>
         <p class="card-text opacity-90 mb-4">All systems operational. Your storage infrastructure is running smoothly with no detected issues.</p>
         <div class="d-flex gap-4">
           <div>
-            <div class="h3 fw-bold mb-0">99.9%</div>
+            <div class="h3 fw-bold mb-0">{{ app.uptime_days }}d</div>
             <small class="opacity-75">Uptime</small>
           </div>
           <div>