Add version to docker build

Author: Samuel Ramirez Berdun

.github/workflows/docker-publish.yml

@@ -22,10 +22,19 @@ jobs:
         username: ${{ secrets.DOCKER_USERNAME }}
         password: ${{ secrets.DOCKER_PASSWORD }}
 
+    - name: Set version tag
+      id: version
+      run: |
+        VERSION=$(cat version.txt)
+        echo "Version from file: ${VERSION}"
+        echo "VERSION=${VERSION}" >> ${GITHUB_OUTPUT}
+
     - name: Build and push Docker image (multi-arch)
       uses: docker/build-push-action@v5
       with:
         context: .
         platforms: linux/amd64,linux/arm64
         push: true
-        tags: ${{ secrets.DOCKER_USERNAME }}/speedtest-monitor:latest
+        tags:
+          ${{ secrets.DOCKER_USERNAME }}/speedtest-monitor:latest          
+          ${{ secrets.DOCKER_USERNAME }}/speedtest-monitor:${{ steps.version.outputs.VERSION }}