Publish Docker image #37

	name: Publish Docker image

	on:
	push:
	tags:
	- 'v*'

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

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

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

	- name: Log in to Docker Hub
	uses: docker/login-action@v1
	with:
	username: ${{ secrets.DOCKER_USERNAME }}
	password: ${{ secrets.DOCKER_PASSWORD }}

	- name: Extract metadata (tags, labels) for Docker
	id: meta
	uses: docker/metadata-action@v3
	with:
	images: mattn/nostr-buzzword

	- name: Build and push Docker image
	uses: docker/build-push-action@ad44023a93711e3deb337508980b4b5e9bcdc5dc
	with:
	context: .
	platforms: linux/amd64
	builder: ${{ steps.buildx.outputs.name }}
	push: ${{ github.event_name != 'pull_request' }}
	tags: ${{ steps.meta.outputs.tags }}
	labels: ${{ steps.meta.outputs.labels }}
	cache-from: type=gha
	cache-to: type=gha,mode=max # mode=maxを有効にすると、中間ステージまで含めてキャッシュできる

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