My relx configuration {release,{socket,"0.1.0"}}. {extend_start_script,true}. My .app file {application,socket, [{description,[]}, {vsn,"1"}, {registered,[]}, {applications...

I searched for package management on Erlang and Elixir and got some pointers to rebar rebar3 mix hex and relx etc. Can you help clarify the relationships among them? Where to use what? Is package j...