chore(github-action): Create github action for docker hub description

Signed-off-by: Pranav C <61551451+pranavxc@users.noreply.github.com>

.github/workflows/docker-readme-publish.yml

@@ -0,0 +1,18 @@
+name: Publish Docker Description
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  docker-description:
+    runs-on: ubuntu-20.04
+    steps:
+      - name: Docker Hub Description
+        uses: peter-evans/dockerhub-description@v2
+        with:
+          username: ${{ secrets.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+          repository: nocodb/nocodb