Reduce number of builds and add status badge (wip)

Merge pull request #3 from geekstuff-it/docker-build-test-status

Add docker build status

Fix issue in last release autobuilds

v0.1.7

Remove echo

Cleanup hooks and normalize builds/pushes

v0.1.6

Improve & cleanup build hooks

Test less builds during release

v0.1.5

Try some build tweaks

Add multiple builds

(and also test tag autobuilds)

Adjust auto build on tag

v0.1.3

tweak post_push hook

Add automated docker testing

Just the foundation. No good tests yet.

Insignificant update

Minor cleanup.

Initial release

v0.1.0

Mention "wip" (work in progress) in readme