Create README.md

challenges/osint/WHOIS/README.md

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+# WHOIS Meta
+Find the registry domain ID of meta.com
+
+## Summary
+- **Author:** Lim Li Xuan
+- **Discord Username:** lx9790
+- **Category:** OSINT
+- **Difficulty:** Easy
+
+## Hints
+None
+
+## Files
+None
+
+## Services
+None
+
+## Flags
+- `HEX{1433704_DOMAIN_COM-VRSN}` (static)