build: add flake (#116) #10

	name: Publish Docker Image

	on:
	push:
	branches:
	- master
	# Publish semver tags as releases.
	tags:
	- 'v..*'

	env:
	# Use docker.io for Docker Hub if empty
	REGISTRY: ghcr.io
	# github.repository as <account>/<repo>
	IMAGE_NAME: ${{ github.repository }}


	jobs:
	build:

	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write

	steps:
	- uses: actions/checkout@v4
	- uses: cachix/install-nix-action@v24
	with:
	extra_nix_config: \|
	accept-flake-config = true

	- name: Log into registry ${{ env.REGISTRY }}
	uses: docker/login-action@v3
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Build
	run: \|
	nix run .#container.copyToDockerDaemon

	- name: Docker meta
	id: meta
	uses: docker/metadata-action@v5
	with:
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
	tags: \|
	type=ref,event=branch
	type=semver,pattern={{major}}
	type=semver,pattern={{major}}.{{minor}}
	type=semver,pattern={{version}}

	- name: Tag & push
	run: \|
	for tag in ${{ steps.meta.outputs.tag }}; do
	docker tag webcam-filters:latest $tag
	done

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