Update Theremini/main.py

set dont_start_webserver to True to avoid port collision.

Theremini/main.py

@@ -49,6 +49,7 @@ class Theremini(ReachyMiniApp):
     """Theremin-like Reachy Mini app driven by head pose and right antenna."""
 
     custom_app_url: str | None = f"http://localhost:{DASHBOARD_PORT}/index.html"
+    dont_start_webserver = True
 
     def __init__(self) -> None:
         super().__init__()