### **Solution**
> When opening the site, you'll see a page containing this text:  
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> There are no links or references. However, notice in the URL that we are located inside child directories from the root of the site "/". What happens when we go to a parent directory?  
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> `"/dev/webapp/index.html" → "/dev/"`  
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> This returns a directory listing of the website. An interesting directory that appears is one called "docs/". Enter the directory and file.txt will appear. Open it and a new tab will appear, and that's your flag.  

#### **Flag:** MetaCTF{Dont_l3t_y0ur_d1rect0ries_b3_l1st3d}