Print version number / git commit in log

[neox387]

@piejanssens
To print the version or commit Premiumizer is running on in the log for debugging purposes it needs git, but since docker does not have git installed in the container, I can't get commit it's running on...

So would need to do it manually something like i'm doing with:
config_version = 2.1
req_version = 8.4

but then directly in the premiumizer.py file maybe.. although this would mean on every PR that version number needs to be bumped ..

[piejanssens]

Maybe it can be done from the docker file.

[stale]

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