ci: publish fork images to Docker Hub (mbitsimaging/dicom-rst)

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: feliwir

.github/workflows/dockerhub-publish.yml

@@ -0,0 +1,50 @@
+# Publishes the mbits-imaging fork to Docker Hub (https://hub.docker.com/r/mbitsimaging/dicom-rst).
+# Requires the DOCKERHUB_USERNAME and DOCKERHUB_TOKEN repository secrets.
+name: Publish Docker image to Docker Hub
+on:
+  workflow_dispatch:
+  push:
+    branches: ["main"]
+    tags: ["v*.*.*"]
+env:
+  IMAGE_NAME: mbitsimaging/dicom-rst
+jobs:
+  build-and-push-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    strategy:
+      matrix:
+        include:
+          - dockerfile: Dockerfile
+            suffix: ""
+          - dockerfile: Dockerfile-s3
+            suffix: "-s3"
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Log in to Docker Hub
+        uses: docker/login-action@65b78e6e13532edd9afa3aa52ac7964289d1a9c1
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+      - name: Extract metadata (tags, labels) for Docker
+        id: meta
+        uses: docker/metadata-action@9ec57ed1fcdbf14dcef7dfbe97b2010124a938b7
+        with:
+          images: ${{ env.IMAGE_NAME }}
+          tags: |
+            type=semver,pattern={{version}}
+            type=ref,event=branch
+            type=sha
+          flavor: |
+            latest=auto
+            suffix=${{ matrix.suffix }},onlatest=true
+      - name: Build and push Docker image
+        uses: docker/build-push-action@f2a1d5e99d037542a71f64918e516c093c6f3fc4
+        with:
+          context: .
+          file: ${{ matrix.dockerfile }}
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}