Update command line usage instructions in README for clarity

README.md

@@ -8,11 +8,19 @@ It displays a simple HTML or plain-text page with the client's IP address and an
 
 ### Command Line
 
-To run the server from the command line, use the following command:
+To run the server from the command line:
 
 ```bash
-chmod +x ok-server.py
-./ok-server.py
+python3 ok-server.py
+python3 ok-server.py --look basic
+python3 ok-server.py --bind 127.0.0.1 --port 8080 --look bootstrap
+```
+
+`--look` accepts `basic`, `nice`, or `bootstrap`.
+You can override the look per request with the `look` query parameter, for example:
+
+```bash
+curl -i "http://localhost:8000/?look=basic"
 ```
 
 ### Docker