Support ARM

[Ed_S]

There’s also a difference, I think, in how ARM is pulled from the repo. I don’t fully understand:

@Ed_S

… on Intel the script checks to see if a new image is available, but on ARM it will always pull. The reason given is that ARM always uses a fixed tag. For example, today, we see in the launcher script two possibilities:
image="discourse/base:2.0.20240825-0027"
or
image="discourse/base:aarch64"
and as you see, one of those is maintained carefully as new images are approved, and the other is left to the position of the tag.