ci: add workflow to update dockerhub description automatically

.github/workflows/dockerhub-description.yml

@@ -0,0 +1,30 @@
+# https://github.com/peter-evans/dockerhub-description
+
+name: Update Docker Hub Description
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - README.md
+      - .github/workflows/dockerhub-description.yml
+
+env:
+  IMAGE_NAME: paessler/multi-platform-probe
+
+jobs:
+  update-description:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Check out the repository
+        uses: actions/checkout@v4
+
+      - name: Docker Hub Description
+        uses: peter-evans/dockerhub-description@v4
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PUSH_TOKEN }}
+          repository: ${{ env.IMAGE_NAME }}
+          short-description: ${{ github.event.repository.description }}
+          enable-url-completion: true