Optimize github action workflow by using dockerhub cache

[nilodna]

Implement the cache method through the docker hub registry in the github action workflows. This reduces the build time as it will not have to run instructions that have not been impacted by changes in the Dockerfiles and also reduces the number of pulls we complete against Docker Hub.

This should work only by adding the following code at the end of the yaml file:

          builder: ${{ steps.buildx.outputs.name }}
          push: true
          tags: ${{ secrets.DOCKER_USER }}/docker4roms:latest
          cache-from: type=registry,ref=${{ secrets.DOCKER_USER }}/docker4roms:buildcache
          cache-to: type=registry,ref=${{ secrets.DOCKER_USER }}/docker4roms:buildcache,mode=max