Updates #36

	name: Build backend container
	on:
	push:
	# Pattern matched against refs/tags
	tags:
	- "**" # Push events to every tag including hierarchical tags like v1.0/beta

	jobs:
	docker:
	runs-on: ubuntu-latest
	permissions:
	packages: write
	contents: read
	steps:
	- name: Checkout
	uses: actions/checkout@v3
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v2
	- name: Cache Docker layers
	uses: actions/cache@v3
	with:
	path: /tmp/.buildx-cache
	key: ${{ runner.os }}-buildx-backend-${{ github.sha }}
	restore-keys: \|
	${{ runner.os }}-buildx-backend
	- name: Extract tag name
	shell: bash
	run: echo "GIT_TAG=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
	id: extract_tag
	- name: Login to GitHub Container Registry
	uses: docker/login-action@v2
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	- name: Build and push
	uses: docker/build-push-action@v3
	with:
	context: .
	file: Dockerfile
	push: true
	tags: ghcr.io/worty/go-push:${{ env.GIT_TAG }}, ghcr.io/worty/go-push:latest
	cache-from: type=local,src=/tmp/.buildx-cache
	cache-to: type=local,mode=max,dest=/tmp/.buildx-cache-new
	- # Temp fix
	# https://github.com/docker/build-push-action/issues/252
	# https://github.com/moby/buildkit/issues/1896
	name: Move cache
	run: \|
	rm -rf /tmp/.buildx-cache
	mv /tmp/.buildx-cache-new /tmp/.buildx-cache

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