fix docker push permissions #207

	---

	name: CI
	on:
	push:
	branches:
	- master
	pull_request: {}

	concurrency:
	group: ${{ format('{0}/{1}', github.repository_owner, github.ref) }}
	cancel-in-progress: true

	permissions:
	contents: read
	packages: write

	jobs:
	lint:
	name: Lint
	runs-on: ubuntu-latest
	steps:
	- name: Checkout the source code
	uses: actions/checkout@v4

	- name: Run the custom linter
	run: ./lint.sh

	build:
	name: Build images
	runs-on: ubuntu-latest
	needs: [lint]

	# Use the same job to build all Linux-based images
	strategy:
	matrix:
	image:
	- linux
	- linux-micro

	steps:
	- name: Checkout the source code
	uses: actions/checkout@v4

	- name: Build the Docker image
	run: docker build -t ghcr.io/${{ github.repository }}/${{ matrix.image }}:latest ${{ matrix.image }}/

	- name: Authenticate with GitHub Container Registry
	uses: docker/login-action@v3
	with:
	registry: ghcr.io
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}
	if: github.event_name == 'push' && github.ref == 'refs/heads/master'

	- name: Upload the Docker image to GitHub Container Registry
	run: docker push ghcr.io/${{ github.repository }}/${{ matrix.image }}:latest
	if: github.event_name == 'push' && github.ref == 'refs/heads/master'

Provide feedback