chore: update doc for start script and remove old script (#389)

Author: kartikangiras

README.md

@@ -426,7 +426,7 @@ Clone repository and enter directory:
 
 Start:
   ```
-  ./scripts/start_local
+  ./scripts/start
   ```
 
   This will run in the foreground of the terminal until you stop it with Ctrl+C.