It's fine that you're using Angular. Be happy if the rewrite succeeds.
If you run npm run start (or whatever script you use) in a NodeJS project, Windows' CMD (or PowerShell), at least on Windows Server, usually blocks/freezes the console after you logout, so you get nothing.
Now, to fix it, the PM2 tool is your best buddy. It's very simple to set up and run if you follow their instructions.
I'm not a MongoDB user. I believe you'll need a service to keep it running at all times.
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