404 not found error

Tell us what’s happening:
Describe your issue in detail here.
please check my code where i am doing wrong always getting 404 not found error
Your code so far

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36.

Challenge: Install and Require Helmet

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