Optimize PR checks #3981

	name: Docker build
	on:
	pull_request:
	branches: [ main ]
	types: [opened, synchronize, reopened]
	paths:
	- 'frontend/**'
	- '!frontend/stats/**'
	- 'backend/**'
	- '.github/workflows/build-image-on-pr.yaml'
	workflow_dispatch:

	jobs:
	docker-build:
	name: Build image
	runs-on: ubuntu-latest
	container:
	image: docker:latest
	steps:
	- name: Checkout
	uses: actions/checkout@v4
	with:
	fetch-depth: 0 # Shallow clones should be disabled for a better relevancy of analysis
	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v3
	- name: Build image
	uses: docker/build-push-action@v5
	with:
	context: .
	cache-from: type=gha
	cache-to: type=gha,mode=max

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