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:15
15: Pulling from ironbank/opensource/postgres/postgresql
no matching manifest for linux/arm64 in the manifest list entries

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

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