Action that triggers docker build on push to main. #1

	name: Build Docker Images
	on:
	push:
	branches:
	- main

	jobs:
	build:
	name: Build and push docker images
	permissions:
	contents: read

	runs-on: ubuntu-latest

	steps:
	- name: Checkout repository
	uses: actions/checkout@v2

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v1

	- name: Setup Docker Metadata
	id: docker_metadata
	uses: docker/[email protected]
	with:
	images: catalystcoop/pudl-output-differ
	flavor: latest=auto
	tags: \|
	type=sha,prefix={{branch}}-
	type=raw,value=latest-{{branch}}

	- name: Login to DockerHub
	uses: docker/login-action@v1
	with:
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}

	- name: Build and push
	uses: docker/build-push-action@v2
	with:
	context: .
	push: true
	tags: ${{ steps.docker_metadata.outputs.tags }}
	labels: ${{ steps.docker_metadata.outputs.labels }}
	cache-from: type=gha
	cache-to: type=gha,mode=max

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