add multiple tags

Author: pseudozach

.github/workflows/docker-image.yml

@@ -14,4 +14,4 @@ jobs:
     - name: login to docker hub
       run: echo "${{ secrets.DOCKER_PASSWORD }}" | docker login -u "${{ secrets.DOCKER_USERNAME }}" --password-stdin
     - name: Build the Docker image
-      run: docker buildx build --push --tag pseudozach/lnstxbridge-frontend:latest --platform linux/amd64 .
+      run: docker buildx build --push --tag pseudozach/lnstxbridge-frontend:$(date +%s) --tag pseudozach/lnstxbridge-frontend:latest --platform linux/amd64 .