**Description**
Welcome to the web!https://charlotte-tlejfksioa-ul.a.run.app/ 
**Knowledge required :**1) Basic Understanding of HTML source code2) Basic Understanding of HTTP methods
**Solution:**
1) Looking at the site and pressing the button on it does not lead to anywhere2) Naturally we look into the source code3) We spot a comment hinting to a `/src` directory```<button onclick='start()'>click me for the flag</button>
```4)Visiting the directory reveals a source code that hints to another directory  that contains the flag:```@app.route('/super-secret-route-nobody-will-guess', methods=['PUT'])def flag():  return open('flag').read()```
5) Accessing the directory via the PUT command gives us the flag.(I did it with Burp Suite as I observe the site from there, it can be done with curl as well)
```wctf{y0u_h4v3_b33n_my_fr13nd___th4t_1n_1t53lf_1s_4_tr3m3nd0u5_th1ng}```