chore(docker): Add source OCI labels

[Kernald]

Checklist before requesting a review

• I have read the contributing guidelines.

Type of change

Please delete options that are not relevant.

Describe your changes

These labels are used, among other things, by Renovate to pull changelogs/link to the upstream repository automatically (https://docs.renovatebot.com/modules/datasource/docker/). I'm not sure where/if the Alpine image is pushed, so I couldn't check that one, but the issue with the main image is that it already has some labels set from upstream:

$ skopeo inspect docker://ghcr.io/foxxmd/multi-scrobbler:0.11.2 | jq '.Labels."org.opencontainers.image.source"'
"https://github.com/linuxserver/docker-baseimage-debian"

There are some more that you might want to override as well.

Issue number and link, if applicable

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[FoxxMD]

Hey that's pretty cool! I didn't know renovate could do that. Thanks for the contribution.