JSON endpoint not serving json object

Tell us what’s happening:
I followed the challenge instructions and did this:

But the /json endpoint doesn’t serve the json object that i pass in res.json()

Your code so far
here is the link to my code

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:81.0) Gecko/20100101 Firefox/81.0.

Challenge: Serve JSON on a Specific Route

Link to the challenge:

This should be a valid solution. I verified with getting a json response with: https://notablebubblyworkspace--five-nine.repl.co/json

Try submitting the URL (https://notablebubblyworkspace--five-nine.repl.co).