Feature request: Add opencontainer labels to Docker images

[RyanNgWH]

Description

It would be awesome if the Docker container images had opencontainers labels. I have seen this across multiple other containers and believe this is the standard for labeling images.

https://github.com/opencontainers/image-spec/blob/main/annotations.md

Doing a docker inspect on the current images shows only the label "maintainer": "[email protected]". Adding labels such as org.opencontainers.image.version would be great. This will provide a way to obtain the current version of Vikunja from the running docker image which can be useful in automating the process of checking for updates.

Here is an example of the Jellyfin docker image with opencontainers labels:

"Labels": {
    "org.opencontainers.image.description": "The Free Software Media System",
    "org.opencontainers.image.documentation": "https://jellyfin.org/docs/",
    "org.opencontainers.image.source": "https://github.com/jellyfin/jellyfin",
    "org.opencontainers.image.title": "Jellyfin",
    "org.opencontainers.image.url": "https://jellyfin.org",
    "org.opencontainers.image.version": "10.9.8"
}

Vikunja Version

0.24.0

Browser and version

No response

Can you reproduce the bug on the Vikunja demo site?

Yes

Screenshots

No response