Right now in different places in the SE codebase there are references to /opt and then as well to /usr.

All SE code should reference one place only. Could someone please create a PR that fixes this.

This PR should also take PR #454 into consideration (no conflicts)

First of all, good job!

Some minor note:
I noticed here that you are forwarding ports docker container creation. But you are also using option --net=host on the same line. This behavior is pointless, as the port forwarding concept doesn't exists when using host's network.

You can feel free to remove all -p opti