Client automatically disconnects after some time

[DoubleBoba]

Hello! I'm trying to set up my own ssh server. I want the connection to be continuous. But when I connect to the server via my openssh client it disconnects after a few lines of data are received.

There is my code: https://gist.github.com/DoubleBoba/1f4802660329930298ef938c60f899f6
There is ssh client log: https://gist.github.com/DoubleBoba/ddc4423e042cc3051089f4e4c532608c

Can someone help me fix these disconnections? I want the connection to live as long as possible.

[DoubleBoba]

I fixed it! The problem was in lxc exec command misconfiguration. I set up signals transfer from client to server and everything now is working fine.