ci: run docker build on push to master #3

	name: Build and push docker image

	on:
	workflow_dispatch:
	workflow_call:
	push:
	branches:
	- master

	jobs:
	build_and_push_docker_image:
	runs-on: ubuntu-latest
	steps:
	- name: Check out code
	uses: actions/[email protected]

	- name: Log in to Docker Hub
	uses: docker/login-action@v2
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2

	- name: Determine tag
	id: determine_tag
	run: \|
	base_image="ghcr.io/dfe-digital/buying-for-schools-v2"
	branch="${{ github.ref_name }}"
	commit="$(echo $GITHUB_SHA \| head -c7)"

	if [ "$branch" == "master" ]; then
	echo tags=${base_image}:${commit},${base_image}:latest >> $GITHUB_OUTPUT
	else
	echo tags=${base_image}:${commit},${base_image}:${branch} >> $GITHUB_OUTPUT
	fi

	- name: Build and push
	uses: docker/build-push-action@v4
	with:
	context: .
	push: true
	tags: ${{ steps.determine_tag.outputs.tags }}

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