Update README.md #67

	---
	name: publish latest

	# Actions on the main branch for every change.

	# -----------------
	# Control variables (GitHub Secrets)
	# -----------------
	#
	# At the GitHub 'organisation' or 'project' level you must have the following
	# GitHub 'Secrets' defined (i.e. via 'Settings -> Secrets'): -
	#
	# DOCKERHUB_USERNAME
	# DOCKERHUB_TOKEN
	#
	# -----------
	# Environment (GitHub Environments)
	# -----------
	#
	# Environment (n/a)

	on:
	push:
	branches:
	- 'main'

	jobs:
	lint:
	runs-on: ubuntu-latest
	steps:
	- uses: actions/checkout@v2
	- name: Set up Python
	uses: actions/setup-python@v2
	with:
	python-version: '3.9'
	- name: Install dependencies
	run: \|
	python -m pip install --upgrade pip
	pip install -r build-requirements.txt
	- name: Lint
	run: yamllint .

	publish-latest:
	needs: lint
	runs-on: ubuntu-latest
	steps:
	- name: Check out the repo
	uses: actions/checkout@v2
	- name: Login to docker hub
	uses: docker/login-action@v1
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}
	- name: Write image repo to env-file
	run: echo IMAGE_REPOSITORY=$(echo ${{ github.repository }} \| tr '[:upper:]' '[:lower:]') >> $GITHUB_ENV
	- name: Publish latest to docker hub - ${{ env.IMAGE_NAME }}
	uses: docker/build-push-action@v2
	with:
	push: true
	tags: ${{ env.IMAGE_REPOSITORY }}:latest

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