GitHub Jobs API with Dark mode toggle

Hello everyone,

I've just completed another API project let me know what you think.

I would also like to know if this is a good solution for detecting a dark mode on a website.

NOTE: Keep in mind because of CORS errors that are triggered by API I'm using a proxy server, in other to access the data. It is possible that you can experience around 5 seconds delay when the website is loading because the proxy is hosted on heroku and it's possible that the node needs to start-up, usually after 30 minutes of nobody visiting the website.