<How do I build a server for an Android app?> How ...

# stackoverflow

[user]

How do I build a server for an Android app?
How do I go about connecting my app to a server? I've literally no idea
I have an application which is connected to firebase for Google sign in. Now I need to make a server to facilitate connection between people (kinda like messaging) My question is where do I write the code for backend? I have a bit of experience with Django so I reckon I can use Django for building the server but how can I go about connecting it to my application? Sorry if I'm not making sense. Guidance is appreciated....