Create GH Action to build & update the Docker image

[michaelosthege]

In #5881 the Dockerfile was updated to work for PyMC v4+, and @danhphan also pushed them to https://hub.docker.com/r/pymc/pymc/tags manually.

We should add a GitHub Actions pipeline to automatically build a new image on new releases, and push it tagged as latest and with the version.

[twiecki]

@danhphan Is this something you can help with?

[danhphan]

Hi @twiecki I would love to do it, but current really busy as I have two papers' submission deadline at the end of this month. And also need to focus on the GSoC project.

Could be great if someone can go ahead to do it. Otherwise, I will do it early next month. Thanks all.

[symeneses]

I would like to work on this 🙌🏽

[5hv5hvnk]

@symeneses I didn't realise you were working on it too
I wrote some of the script haven't tested it yet (but I am hopeful it will work fine) you can go through it once

name: Push Dockerfile to docker docker hub
on:
	push:
		paths:
			- 'scripts/Dockerfile'

jobs:
	build-container:
		name: Build docker image
		runs-on: ubuntu-latest
		steps:
			- name: Checkout code
			  uses: actions/checkout@v2
			- name: Publish tp docker hub
			  uses: docker/build-push-actions@v1
			  with:
			  	username: ${{ secrets.Docker-Username}}
			  	password: ${{ secrets.Docker-Password}}
			  	repository: pymc/pymc
			  	tags: latest

We will have to add secrets for docker password and username rest seems fine to me

[symeneses]

@5hv5hvnk all good, I just opened a PR for this #5966.

[michaelosthege]

Assuming that the fixes from #5977 will succeed, I'm closing this 🎉