It looks like v6 and v5 are too different from an architecture perspective, as I can’t get a container running with that image (can’t even just get a shell), as the exit code Exited (132) tends to show.
$ docker run -v /tmp/bitwarden_data/:/data/ -p 80:80 bitwardenrs/server:latest-arm32v6
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
$ docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
bed217090fae bitwardenrs/server:latest-arm32v6 "/usr/bin/dumb-init …" 13 seconds ago Exited (132) 9 seconds ago
I’ll have a look to what you’ve pointed out with the rust-musl-cross version.
As I am not a Docker expert it can take a while, but I’ll report back here if I manage to make it work in case it could help other people