Bump actions/cache from 3 to 4 (#72) #19

	name: DOCKER

	on:
	push:
	# Trigger this workflow on changes to `main`
	branches: [ main ]
	# Trigger this workflow if a semver tag is pushed
	tags: [ 'v..*' ]

	env:
	# Our main, default container registry
	GHC_REGISTRY: ghcr.io
	# github.repository will be <account>/<repo>, for example, DEFRA/sroc-charging-module-api-tests
	IMAGE_NAME: ${{ github.repository }}

	jobs:
	build:
	runs-on: ubuntu-latest
	steps:
	- name: Checkout repository
	uses: actions/checkout@v4

	# Login against a GitHub Container registry
	# https://github.com/docker/login-action
	- name: Log into GH Container Registry
	uses: docker/login-action@v3
	with:
	registry: ${{ env.GHC_REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	# Extract metadata (tags, labels) for Docker
	# https://github.com/docker/metadata-action
	- name: Extract Docker metadata
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ env.GHC_REGISTRY }}/${{ env.IMAGE_NAME }}

	# Build and push Docker image with Buildx
	# https://github.com/docker/build-push-action
	- name: Build and push Docker image
	uses: docker/build-push-action@v5
	with:
	context: .
	target: production
	push: true
	labels: ${{ steps.meta.outputs.labels }}
	tags: ${{ steps.meta.outputs.tags }}

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