BC: versioning from 0.1.0

[tebaly]

auto build and publish OCI + GitLab pages

BC:

• image.tag values
• versioning from 0.1.0

FIX:

• add env.secrets values
• PodDisruptionBudget v1
• ingress v1
• tagPrefix version without "v"
• gitlab-ci

[rccrdpccl]

Thanks for your contribution! Unfortunately at the moment this PR cannot be merged as it is: there are parts that could be merged, parts that could be improved and merged, and parts that we cannot merge at present time.

If broken up, we will be willing to merge:

• change apiversion/specs of Ingress
• changes apiversion of PDB
• adding secrets to deployment
• change how we reference deployment's image

If you open separate PRs about the above changes (the first two and last two can be grouped together), we are willing to review them and merge.

Unfortunately the CI change is not in line with our standards (we have our own chartmuseum at the moment).
Do you see any reason why we should publish OCI image instead?

We would be willing to accept a PR on CI if it'd go towards our standards, or give us enough reason to change them.

[bvis]

I'll close this PR, amazing proposal but unresponsive for a long time. @tebaly we'll be glad for future collaborations