Add instructions to setup pre push hook

Author: satyam-seth

README.md

@@ -1073,3 +1073,17 @@ python3 manage.py test
   ```
 
 - Note:- pre commit official [doc](https://pre-commit.com/)
+
+14. Setup pre push hook
+
+- for linux or macos
+
+  ```sh
+  cp .githooks/pre-push .git/hooks/pre-push && chmod +x .git/hooks/pre-push
+  ```
+
+- for windowns
+
+  ```sh
+  copy .githooks\pre-push .git\hooks\pre-push
+  ```