ci: build and push to docker hub

Author: buchdag

.github/workflows/build-publish.yml

@@ -0,0 +1,63 @@
+name: Build and publish Docker image
+
+on:
+  workflow_dispatch:
+  push:
+    branches:
+      - main
+    tags:
+      - "*.*.*"
+
+jobs:
+  multiarch-build:
+    name: Build and publish image
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Get Docker tags
+        id: docker_meta
+        uses: docker/metadata-action@v5
+        with:
+          images: |
+            nginxproxy/${{ github.event.repository.name }}
+          tags: |
+            type=semver,pattern={{version}}
+            type=semver,pattern={{major}}.{{minor}}
+            type=raw,value=latest,enable=${{ github.ref == 'refs/heads/main' }}
+          labels: |
+            org.opencontainers.image.authors=Nicolas Duchon <nicolas.duchon@gmail.com> (@buchdag)
+          flavor: |
+            latest=false
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to DockerHub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Build and push the image
+        id: docker_build
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          platforms: linux/amd64,linux/arm64,linux/s390x,linux/arm/v7
+          sbom: true
+          push: true
+          provenance: mode=max
+          tags: ${{ steps.docker_meta.outputs.tags }}
+          labels: ${{ steps.docker_meta.outputs.labels }}
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+
+      - name: Images digests
+        run: echo ${{ steps.docker_build.outputs.digest }}

Dockerfile

@@ -0,0 +1,3 @@
+FROM alpine
+
+CMD [ "echo", "Hello World" ]