Adds GitHub Actions workflow to publish Docker images on tag.

Author: laurentftech

.github/workflows/release.yml

@@ -197,3 +197,33 @@ jobs:
             artifacts/dist-linux/*.tar.gz
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  publish-docker:
+    name: Publish Docker Image
+    runs-on: ubuntu-latest
+    needs: [build-arm64, build-intel, build-windows, build-linux] # Ensure all desktop builds are done
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+
+      - name: Log in to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v5
+        with:
+          images: gandulf78/podcast_generator
+          tags: |
+            type=ref,event=tag # Use the Git tag (e.g., v1.0.0) as the Docker tag
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v5
+        with:
+          context: .
+          push: true
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.outputs.labels }}