Merge pull request #25 from rosiel/tags

Use `$GITHUB_REF_NAME` to work with both branches and tags.

Merge pull request #23 from klinkeklinke/master

Specify safe directory earlier in the code

Merge pull request #22 from klinkeklinke/master

Specify safe directory to mitigate dubious ownership issue

Merge pull request #13 from krauthosting/master

SSL certificate problem due to not updated trust pool

Note on active polling

Make everything silent and echo status during poll