docker missing arches

[brettowe]

looking at https://linbreux.github.io/wikmd/installation/docker.html it says "Docker files are available for arm, arm64 and amd64." however if you look at: https://hub.docker.com/r/linbreux/wikmd/tags only amd64 is listed. and when trying to use the docker compose example you will see the error "exec format error" in logs when attempting to start the container on an arm64 system.