Do not close channels at the end of the program
Do not close channels at the end of the program

Closing channels is not mandatory, it is just a tool for flow control.

This causes problem sometimes when the channel is already closed,
but the server is still running. When the server finally stops,
it tries to send an error to the channel (which is already closed).

deshboard/boilerplate-service,deshboard/boilerplate-model-service,deshboard/boilerplate-grpc-service,deshboard/boilerplate-crondaemon