add publish-desc job

.github/workflows/build.yml

@@ -55,3 +55,19 @@ jobs:
         semver: ${{ env.SEMVER }}
         suffix: ${{ env.SUFFIX }}
         publish: true
+
+  publish-desc:
+
+    runs-on: ubuntu-latest
+    needs: build
+
+    steps:
+    - uses: actions/checkout@v1
+
+    - name: Update Docker Hub Description
+      uses: peter-evans/dockerhub-description@v2.1.0
+      env:
+        DOCKERHUB_USERNAME: wsmoogle
+        DOCKERHUB_PASSWORD: ${{ secrets.DOCKER_REGISTRY_PASSWORD }}
+        DOCKERHUB_REPOSITORY: weseek/growi
+        README_FILEPATH: ./docker/README.md