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-alpine:16
16: Pulling from ironbank/opensource/postgres/postgresql-alpine
995e7a034190: Pull complete
75686f8c6812: Pull complete
6ed2e620d2ff: Pull complete
Digest: sha256:c7e374b2bf543d441bea6aa419088ff6f7f25bc65eef2acdbadf1eb6ee59bb2c
Status: Downloaded newer image for registry1.dso.mil/ironbank/opensource/postgres/postgresql-alpine:16
image with reference registry1.dso.mil/ironbank/opensource/postgres/postgresql-alpine: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