docs: Update readme #18

	name: Create and publish a Docker image

	on:
	push:
	branches: ['main']

	env:
	REGISTRY: ghcr.io
	REPO_NAME: ${{ github.repository }}
	DOCKER_SLIM_VERSION: 1.37.3

	jobs:
	build-and-push-image:
	runs-on: ubuntu-latest

	permissions:
	contents: read
	packages: write

	steps:
	- name: Set docker image env var
	run: \|
	echo "IMAGE_NAME=${{ env.REGISTRY }}/${{ env.REPO_NAME }}:${{ env.DOCKER_SLIM_VERSION }}" >> $GITHUB_ENV

	- name: Checkout repository
	uses: actions/checkout@v3

	- name: Login to GitHub Container Registry
	uses: docker/login-action@v2
	with:
	registry: ghcr.io
	username: ${{ secrets.DOCKER_USERNAME }}
	password: ${{ secrets.DOCKER_TOKEN }}

	- name: Build and push Docker image
	uses: docker/build-push-action@v4
	with:
	context: .
	build-args: \|
	"DOCKER_SLIM_VERSION=${{ env.DOCKER_SLIM_VERSION }}"
	push: true
	tags: ${{ env.IMAGE_NAME }}

	- name: Make a Slim image
	uses: kitabisa/docker-slim-action@v1
	env:
	DSLIM_HTTP_PROBE: false
	with:
	target: ${{ env.IMAGE_NAME }}
	tag: "${{ env.DOCKER_SLIM_VERSION }}-slim"

	# Push to the registry
	- run: docker push ${{ env.IMAGE_NAME }}-slim

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