How to deploy and link two apps on Heroku?

Question

Python

Good afternoon. I'll get right to the point:
There are two applications, a Go socket server that accepts and outputs
Python-flask JSON to the console, which, when going to /test, sends a JSON message to the socket at the address/port specified in env.

Actually, the question to which I still did not find an answer a month later: how, having two git repos with these two applications, deploy them on Heroku, and even so that messages could be sent between them via sockets?

Answer 1

https://devcenter.heroku.com/articles/how-heroku-works
Then, in the environment variables of one application, specify the URL of another, so that it knows where to send data.