Fix Gitlab CI, lint, start updating to molecule 3

I couldn't get molecule to actually work again - appears to be some issue with ansible+systemd+docker.

This also fixes a security issue: The django secret key was previously installed as 644 (world-readable).

mentioned in issue #16 (closed)

added 1 commit

• 4869fa83 - Fix Gitlab CI, lint, start updating to molecule 3

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@half-duplex Thank you for the contribution! There seems to be a lot of stuff included, so I really hope I did not overlooked some issues, but this seems generally fine to me and I am going to merge. For future contributions please consider smaller bits, its easier to review. Thank you!

mentioned in commit 55c6f281

merged