GitHub workflows for image build and helm chart release

[tylerobara]

I have added some GitHub workflows that will build the container images for the database, nginx and webapp. I have also added a workflow that will release the helm chart when there are changes.
Notes:

• One workflow per image iriswebapp_db and iriswebapp_app
  • The images will pushed to ghcr.io/dfir-iris/iriswebapp_{db, app, nginx}
  • The tags will be main if there is a push to main and the tag value if there is a release, example: v2.4.6
• Changed docker-compose.yml so that it will pull images from ghcr.io instead of building them
• The helm chart from deploy/kubernetes will be published to a gh-pages branch. After published the chart will be available for install by running

  helm repo add dfir-iris https://dfir-iris.github.io/iris-web/
  helm upgrade --install iris dfir-iris/iris-web --values my-custom-values.yaml
  

• Renamed nginx_ingress.yaml to ingress.yaml Reflects that the template already supports other Ingress classes such as Traefik
• Upgraded database base image to postgres 16

Images have been tested with docker-compose and k8s deployments

REQUIREMENTS IF PR IS ACCEPTED:

• create branch gh-pages
  • Ensure gh-pages is the default Pages branch at Settings > Pages
• Ensure packages availability is set to public GitHub docs - packages
• Change branch master to main GitHub docs -renaming
  • Or change workflow triggers from main to master

[whikernel]

Thanks a lot @tylerobara - amazing 🎉

[tylerobara]

I also added the part that will build for arm64 as well. I don't think I went back and tested on my Raspberry Pi though.

[bpereto]

can we merge this?