Use docker/metadata-action to extract metadata

Author: simonhammes

.github/workflows/docker.yml

@@ -16,11 +16,23 @@ jobs:
     steps:
     - uses: actions/checkout@v4
 
-    - name: Login to Docker Hub
-      uses: docker/login-action@v3
+    #- name: Login to Docker Hub
+    #  uses: docker/login-action@v3
+    #  with:
+    #    username: ${{ secrets.DOCKERHUB_USER }}
+    #    password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+    - name: Extract metadata
+      id: metadata
+      uses: docker/metadata-action@v5
       with:
-        username: ${{ secrets.DOCKERHUB_USER }}
-        password: ${{ secrets.DOCKERHUB_TOKEN }}
+        images: |
+          ${{ secrets.DOCKERHUB_USER }}/${{ env.IMAGE_NAME }}
+        tags: |
+          type=semver,pattern={{version}}
+
+    - name: Debug
+      run: echo ${{ steps.metadata.outputs.tags }}
 
     - name: Set up Docker Buildx
       uses: docker/setup-buildx-action@v3