Update build.yml #4

	name: Publish Docker image

	on:
	push:
	tags:
	- 'v[0-9]+.[0-9]+.[0-9]+'
	release:
	types: [published]
	pull_request:
	branches:
	- master
	paths:
	- 'Dockerfile'
	- 'Cargo.toml'
	- 'Cargo.lock'
	- 'contributing.Dockerfile'
	- '.github/workflows/docker.yml'

	jobs:
	push_to_registry:
	name: Push Docker image to Docker Hub
	runs-on: ubuntu-latest
	steps:
	- name: Check out the repo
	uses: actions/checkout@v3

	- name: Log in to Docker Hub
	uses: docker/login-action@v2
	with:
	password: ${{ secrets.DOCKER_PASSWORD }}
	username: ${{ secrets.DOCKER_USERNAME }}

	- name: Extract metadata (tags, labels) for Docker
	id: meta
	uses: docker/metadata-action@v4
	with:
	images: rustscan/rustscan
	flavor: latest=true

	- name: Build and push Docker image
	uses: docker/build-push-action@v3
	with:
	context: .
	push: ${{ contains(fromJson('["push", "release"]'), github.event_name) }} # Publish to docker registry only on push event or new release.
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}

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