Merge pull request #2 from mchro/patch-1 #14

	---
	name: Create and publish a Docker image

	on:
	push:
	branches: ['master']

	env:
	REGISTRY: ghcr.io
	IMAGE_NAME: ${{ github.repository }}

	jobs:
	build-and-push-image:
	runs-on: ubuntu-latest
	permissions:
	contents: read
	packages: write

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

	- name: Log in to the Container registry
	uses: docker/login-action@v1
	with:
	registry: ${{ env.REGISTRY }}
	username: ${{ github.actor }}
	password: ${{ secrets.GITHUB_TOKEN }}

	- name: Extract metadata (tags, labels) for Docker
	id: meta
	uses: docker/metadata-action@v3
	with:
	images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

	- name: Fetch the version from Cargo.toml
	id: retrieve_tag
	run: \|
	echo ::set-output name=crate-tag::$(cat Cargo.toml \| grep version \| head -n1 \| awk '{ print $3 }' \| tr -d '"')
	echo ::set-output name=image_registry::$(echo '${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}' \| tr '[:upper:]' '[:lower:]')
	shell: bash

	- name: Build and push Docker image
	uses: docker/build-push-action@v2
	with:
	context: .
	push: true
	tags: ${{ steps.meta.outputs.tags }},${{ env.REGISTRY }}/${{ steps.retrieve_tag.outputs.image_registry }}:${{ steps.retrieve_tag.outputs.crate-tag }}
	labels: ${{ steps.meta.outputs.labels }}

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