✨(devex) add LIVEKIT_INTERNAL_URL for server-to-server communication

Introduced a LIVEKIT_INTERNAL_URL environment variable for
container-to-container LiveKit communication, using http://livekit:7880 in development.
LIVEKIT_API_URL continues to serve browser-facing requests, and
create_livekit_client() prefers the internal URL when set,
preserving backwards compatibility.

Author: cameledev

src/backend/core/utils.py

@@ -212,7 +212,11 @@ def create_livekit_client(custom_configuration=None):
         custom_session = aiohttp.ClientSession(connector=connector)
 
     # Use default configuration if none provided
-    configuration = custom_configuration or settings.LIVEKIT_CONFIGURATION
+    configuration = {
+        **(custom_configuration or settings.LIVEKIT_CONFIGURATION),
+        "url": settings.LIVEKIT_INTERNAL_URL
+        or (custom_configuration or settings.LIVEKIT_CONFIGURATION)["url"],
+    }
 
     return LiveKitAPI(session=custom_session, **configuration)
 

src/backend/meet/settings.py

@@ -619,6 +619,11 @@ class Base(Configuration):
         ),
         "url": values.Value(environ_name="LIVEKIT_API_URL", environ_prefix=None),
     }
+    # Internal URL for server-to-server LiveKit API calls (e.g. container-to-container).
+    # Defaults to LIVEKIT_API_URL when not set.
+    LIVEKIT_INTERNAL_URL = values.Value(
+        "", environ_name="LIVEKIT_INTERNAL_URL", environ_prefix=None
+    )
     LIVEKIT_FORCE_WSS_PROTOCOL = values.BooleanValue(
         False, environ_name="LIVEKIT_FORCE_WSS_PROTOCOL", environ_prefix=None
     )