add requirements.txt #3

	name: Build and publish image to ghcr.io/epics-containers

	on:
	push:
	pull_request:

	jobs:
	build-and-push-image:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	- name: Determine container image tag to use
	id: tag
	run: \|
	# tag is branch name or tag if there is a tag
	echo ::set-output name=image_tag::${GITHUB_REF##*/}
	echo ::set-output name=do_push::true

	- name: Cache Docker layers
	uses: actions/cache@v3
	with:
	path: /tmp/.buildx-cache
	key: ${{ runner.os }}-buildx-${{ github.sha }}
	restore-keys: \|
	${{ runner.os }}-buildx-

	- name: Log in to GitHub Docker Registry
	uses: docker/login-action@v3
	with:
	registry: ghcr.io/epics-containers
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Set up Docker Buildx
	id: buildx
	uses: docker/setup-buildx-action@v3

	- name: Build developer image
	uses: docker/build-push-action@v5
	with:
	builder: ${{ steps.buildx.outputs.name }}
	push: ${{ steps.tag.outputs.do_push }}
	tags: \|
	ghcr.io/${{ github.repository }}:latest
	ghcr.io/${{ github.repository }}:${{ steps.tag.outputs.image_tag }}

	# - name: Build runtime image
	# uses: docker/build-push-action@v5
	# with:
	# builder: ${{ steps.buildx.outputs.name }}
	# push: ${{ steps.tag.outputs.do_push }}
	# tags: \|
	# ghcr.io/${{ github.repository }}:${{ steps.tag.outputs.image_tag }}.run
	# target: runtime
	# cache-from: type=local,src=/tmp/.buildx-cache
	# cache-to: type=local,dest=/tmp/.buildx-cache

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