Build Docker image

[duhow]

• Added Dockerfile that builds from source code.
• Allows args to build different arch, based on Publish profile.
• Added GitHub Actions Workflow to build on each commit to master and git tag.

Expected image would be ghcr.io/konamiman/nestor80 .
This can later be used to assemble code on other repos.

[Konamiman]

Looks great, thanks! But I'm not very familiar with docker, how could I test your changes?

[duhow]

Once the Docker image is published (after new tag):

docker run --rm -it -v $PWD:/code -w /code ghcr.io/konamiman/nestor80:latest --opciones archivo.asm 

This can also be used in other GitHub repos with GitHub Actions:

- uses: actions/checkout@v3
- name: Run N80
  uses: docker://ghcr.io/konamiman/nestor80:latest
  with:
    args: FILE.ASM