Add multi-platform builds

Feature description

I would like to be able to use this image on macOS 14 which is consider linux/arm64 by Docker.

But currently, it does not seem to be supported. A good chunk of my team also uses macOS, so it would be helpful to us if this image provided a linux/arm64 build as well as the current offerings.

Current Behavior

docker pull registry1.dso.mil/ironbank/opensource/postgres/postgresql:16
16: Pulling from ironbank/opensource/postgres/postgresql
facf1e7dd3e0: Already exists
ec465ce79861: Already exists
f2fdb8865eec: Pull complete
3e100883d821: Pull complete
Digest: sha256:1871a4e1b7b655ec650d23a4559c76125b4327823576fc944e214972e4a0c920
Status: Downloaded newer image for registry1.dso.mil/ironbank/opensource/postgres/postgresql:16
image with reference registry1.dso.mil/ironbank/opensource/postgres/postgresql:16 was found but does not match the specified platform: wanted linux/arm64, actual: linux/amd64

Use cases

For local development on macOS MacBook Pros

Benefits

Would enable local development for any developer on macOS laptops

Requirements

Unknown

Links / references

nodejs20-slim - Was able to include linux/arm64 as one of the images provided - dsop/opensource/nodejs/nodejs-slim/nodejs20-slim#34 (closed)

Tasks

• Feature has been implemented

Please read the Iron Bank Documentation for more info