Revernt changes to Operator Installation

Author: mmahipal

doc/installation/OPERATOR_INSTALLATION_README.md

@@ -57,9 +57,17 @@ If you encounter an issue with these steps, then refer to the more detailed step
 Clone the [oracle-database-operator](https://github.com/oracle/oracle-database-operator) on your local machine
 
 ## Review and modify the Cloned Repository
-Make changes as needed to the repository.
+Make changes as needed to the repository. 
 
-## Build and push the Operator image
+If you want to run the operator locally outside the cluster, then run the following steps:
+
+  ```sh
+    cd oracle-database-operator
+    make generate
+    make manifests
+    make install run
+  ```
+If you want to run the operator inside the cluster, then run the following steps:
 
   ```sh
   cd oracle-database-operator