Create writeup.md

challenges/web/web warm-up/writeup.md

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+This challenge requires you to view source of the HTML pages. There are two ways to complete this.
+
+# First Method
+
+Navigate to the challenge link. We are provided with a site that says to read the description again. Alternatively, we can also view the page source and see that there is a hidden text that links to another page called "why.html".
+
+Once on the "why.html" page, we are given a hint as to how we can obtain the flag.
+
+Viewing the page source again and we are able to see that our flag is hidden on the page.
+
+The flag is: ``Here``
+
+# Second Method
+
+Reading the description, we can see that there is a text called ``why.html``. This can be a hint and we can attempt to navigate to the page called ``why.html``.
+
+Upon navigating to it, we are given a hint as to how we can obtain the flag. We can obtain it by viewing the page source.
+
+The flag is: ``Here``