Really nice use of environmental variables here!

I would remove this whiteline here. Usually we start writing code on the first line like you have done in the post request. Its good to keep all our functions consistent to improve readability.

Express' res.end is a function so you would have to call it like this: res.end(). Calling the function is not necessary here. When you call res.send with your data it calls res.end under the hood. I would remove it as it is unnecessary and we want to keep the code as clean and readable as possible!

Nice work on thinking about the status code! However, res.sendStatus is a function so to call it and set the status code you would have to do this:

res.sendStatus(200)

What you are doing in your code is actually overwriting this function and setting the sendStatus field to 200, so if you try to call res.sendStatus() after this line you will see it fails as it is not a function. You can try this out yourself!

One thing to note is that res.sendStatus(code) immediately will send the response back to the client with the specified status code. So whatever you do after that line to the response object will not have an effect/throw an error. This is not the behavior we want here.

A good thing to point out is that res.send(data) which you call below, automatically sets the status code to 200 and returns the response to the client. So you do not need to manually set the status code. This is nice as it allows us to write less lines of code. If you wanted to overwrite that status code you could call res.statusCode = something to set it before returning the response.

I would remove the 3 white lines, and keep only 1. Good work on separating the functions and leaving space to improve readability. By convention we usually leave one line between our functions to keep a balance between readability of our code and file size. You can imagine if we had more functions in this file and each had 3 white lines separating them it would become harder and harder to scroll down and move between functions!

Good afternoon! Thank you for your work — you were absolutely right about res.sendStatus(200). I actually meant to write res.statusCode = 200;. Based on your comments, I decided not to add the status code explicitly, since res.send() already sets it automatically for me. Thank you again for your help!