ADD ghcr.io image creation to workflow

[rapejim]

Now with Github Container Registry (ghcr.io) too:

• Added extract metadata step (for automated labels and tags of images)
• Changed build&push step from a simple/manual "run" to official docker action.
  (All separated by branch selected)

[benzino77]

Could you please make this PR to development branch?
Why do we need another/additional registry?

[rapejim]

Of course, I change it to the development branch.

Docker has limits for free accounts, for example the retention policy removes an image if no one pull/push it in 6 months. I know it's a long time, but I guess it also doesn't hurt to offer the additional Github registration which is also where the source code is, 😅.

[rapejim]

I have seen that I am doing the PR from my master branch, do you want me to change the source to development in my repository?

[benzino77]

I have seen that I am doing the PR from my master branch, do you want me to change the source to development in my repository?

I think that is a good idea.

[rapejim]

I have seen that I am doing the PR from my master branch, do you want me to change the source to development in my repository?

I think that is a good idea.

Done, #410