Push tags to Docker Hub

Closes #32

.github/workflows/docker.yml

@@ -22,6 +22,17 @@ jobs:
         username: ${{ secrets.DOCKERHUB_USER }}
         password: ${{ secrets.DOCKERHUB_TOKEN }}
 
+    - name: Extract metadata
+      id: metadata
+      uses: docker/metadata-action@v5
+      with:
+        images: |
+          ${{ secrets.DOCKERHUB_USER }}/${{ env.IMAGE_NAME }}
+        # "latest" is automatically generated
+        # Docs: https://github.com/docker/metadata-action?tab=readme-ov-file#latest-tag
+        tags: |
+          type=semver,pattern={{version}}
+
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3
       with:
@@ -38,6 +49,6 @@ jobs:
         platforms: linux/amd64,linux/arm64
         builder: ${{ steps.buildx.outputs.name }}
         push: true
-        tags: ${{ secrets.DOCKERHUB_USER }}/${{ env.IMAGE_NAME }}:latest
+        tags: ${{ steps.metadata.outputs.tags }}
         cache-from: type=registry,ref=${{ secrets.DOCKERHUB_USER }}/${{ env.IMAGE_NAME }}:buildcache
         cache-to: type=registry,ref=${{ secrets.DOCKERHUB_USER }}/${{ env.IMAGE_NAME }}:buildcache,mode=max