Container names were built using the service name. We didn't checked the
name and leave underscores inside.
This commit does:
- fix all service and rename containers (`container_name`)
- use `ContainerName` everywhere we need to get the container by name
See #106
- reduce complexity
- use better tools to format the code
- add more tests
- and too many things to list here
We are rewriting for V3, so these commits are sometimes big and not
fully detailed. Of course, further work will be more documented.
