docs: Add local execution instructions to README

Author: vishnurajkv

README.md

@@ -69,8 +69,14 @@ export NEBIUS_API_BASE="https://api.tokenfactory.nebius.com/v1/"
 
 ## Usage
 
-### CLI Commands
+### Run Locally (Non-Docker)
+Ensure you have installed the package and set your credentials (see Configuration).
 
+```bash
+secnodeapi --target http://api.example.com/swagger.json
+```
+
+### CLI Commands & Options
 Run against a remote schema:
 ```bash
 secnodeapi --target https://api.example.com/swagger.json