Improve pipeline temporarily allowing to pass

[danieldanielecki]

We have continue-on-error: true in .github/workflows/ci.yml on few stages to allow the pipeline to pass.

However, a proper permanent solution is to fix those errors, and remove continue-on-error: true.

[danieldanielecki]

Fixed during last commits of #7 whatever was possible

[danieldanielecki]

A couple of leftovers are there #12 & #11