Feature Request: Better Docker Tags

[XVicarious]

I realize that this is currently in active development and in a beta stage, but as it stands pulling the repository in the entrypoint.sh file could cause a ton of problems in an otherwise working instance especially with commits like this with "BREAKING CHANGES". When you restart a container you'll get these breaking changes without knowing that they exist and can't take action suggested in the commit.

This might be also an issue to bring up in the main repository for itflow, but potentially giving tags to breaking changes could help mitigate these issues.