Regular pipeline should not update docs / push things

[joepio]

Currently we have one main.yml github pipeline that's activated for any push. There are some actions there (e.g. docs being created) that should not happen on every single push.

Thoughts:

• Can we use the --push flag, or the lack of it, to skip certain actions?
• Do we need one or multiple github .yml files for the actions? How do we prevent code duplication?
• Maybe we can also fix the whole tag issue if we split up the yml files invalid reference format Docker tag wrong in CI on release? #738