setup push action

.github/workflows/docker-image.yml

@@ -1,11 +1,17 @@
 name: "Docker Image CI"
 
 on:
+  workflow_dispatch:
   push:
     branches: ["main"]
+    tags: ["v*.*"]
   pull_request:
     branches: ["main"]
 
+env:
+  REGISTRY: "docker.io"
+  IMAGE_NAME: "${{ vars.DOCKERHUB_USERNAME }}/srb2kart-server"
+
 jobs:
   build:
     runs-on: "ubuntu-latest"
@@ -14,7 +20,23 @@ jobs:
         uses: "actions/checkout@v4"
       - name: "Set up Docker Buildx"
         uses: "docker/setup-buildx-action@v3"
+      - name: "Log into registry ${{ env.REGISTRY }}"
+        if: "github.event_name != 'pull_request'"
+        uses: "docker/login-action@v3"
+        with:
+          registry: "${{ env.REGISTRY }}"
+          username: "${{ vars.DOCKERHUB_USERNAME }}"
+          password: "${{ secrets.DOCKERHUB_TOKEN }}"
+      - name: "Extract Docker metadata"
+        id: "meta"
+        uses: "docker/metadata-action@v5"
+        with:
+          images: "${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}"
       - name: "Build the Docker image"
         uses: "docker/build-push-action@v6"
         with:
-          tags: "${{ github.repository }}:latest"
+          push: "${{ github.event_name != 'pull_request' }}"
+          tags: "${{ steps.meta.outputs.tags }}"
+          labels: "${{ steps.meta.outputs.labels }}"
+          cache-from: "type=registry,ref=${{ env.IMAGE_NAME }}:latest"
+          cache-to: "type=inline"