Add more commands to the encointer-client docker image and test them in CI

[clangenb]

In essence this introduces the feature to run the bot-community, phase.py and faucet.py from the enconter-client docker container. To achieve that, a few minor changes were necessary:

• The phase.py CLI has had minor adjustements to be able to run from within a docker container
• The faucet.py now takes some arguments and exposes 0.0.0.0 instead of localhost to be reachable from outside the docker
• Breaking: unify the CLI for our scripts in general such that there is only -u as a url argument. -r has been removed.

Tests:

• The CI does now also run the bootstrap and the bot-community integration tests in docker to ensure that the docker works.

Future work:

• Registering businesses does not work yet, tracking issue: Add registering businesses command to encointer-client docker image #386