update description and don't login on PR's

.github/workflows/dockerimage.yml

@@ -28,6 +28,7 @@ jobs:
         uses: docker/setup-buildx-action@v1
 
       - name: Login to DockerHub
+        if: github.event_name != 'pull_request'
         uses: docker/login-action@v1
         with:
           username: b4tman
@@ -214,3 +215,10 @@ jobs:
         run: |
           rm -rf /tmp/.buildx-cache
           mv /tmp/.buildx-cache-new /tmp/.buildx-cache
+
+      - name: Update repo description
+        uses: peter-evans/dockerhub-description@v2
+        with:
+          username: b4tman
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+          repository: b4tman/app