Dockerfile: reduce image size and update to latest scancode release #9

	name: CI

	on:
	push:
	branches: [ master ]
	tags: [ 'v*' ]
	pull_request:
	branches: [ master ]

	permissions:
	packages: write

	concurrency:
	group: ${{ github.ref }}
	cancel-in-progress: true

	jobs:
	build:
	name: Build
	runs-on: ubuntu-20.04

	steps:
	- name: Checkout
	uses: actions/checkout@v2

	- name: Generate metadata
	id: meta
	uses: docker/metadata-action@v3
	with:
	images: \|
	docker.io/zephyrprojectrtos/scancode
	ghcr.io/zephyrproject-rtos/scancode

	- name: Set up QEMU
	uses: docker/setup-qemu-action@v1

	- name: Set up Docker Buildx
	uses: docker/setup-buildx-action@v1

	- name: Login to DockerHub
	if: ${{ github.event_name != 'pull_request' }}
	uses: docker/login-action@v1
	with:
	registry: docker.io
	username: ${{ secrets.DOCKERHUB_USERNAME }}
	password: ${{ secrets.DOCKERHUB_TOKEN }}

	- name: Login to GitHub Container Registry
	if: ${{ github.event_name != 'pull_request' }}
	uses: docker/login-action@v1
	with:
	registry: ghcr.io
	username: ${{ github.repository_owner }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Build and push Docker image
	uses: docker/build-push-action@v2
	with:
	context: .
	file: Dockerfile
	platforms: linux/amd64
	push: ${{ github.event_name != 'pull_request' }}
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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