fixed asgi.py, added option to serve static files via starlette

src/c3nav/asgi.py

@@ -1,4 +1,5 @@
 import os
+from contextlib import suppress
 
 from channels.auth import AuthMiddlewareStack
 from channels.routing import ProtocolTypeRouter, URLRouter
@@ -6,11 +7,30 @@ from django.core.asgi import get_asgi_application
 
 from c3nav.urls import websocket_urlpatterns
 
-os.environ.setdefault('DJANGO_SETTINGS_MODULE', 'mysite.settings')
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "c3nav.settings")
+django_asgi = get_asgi_application()
 
 application = ProtocolTypeRouter({
-  "http": get_asgi_application(),
-  "websocket": AuthMiddlewareStack(
-    URLRouter(websocket_urlpatterns)
-  ),
+    "http": django_asgi,
+    "websocket": AuthMiddlewareStack(
+        URLRouter(websocket_urlpatterns)
+    ),
 })
+
+# optional support for static files via starlette
+with suppress(ImportError):
+    # settings need to be loaded after django init via get_asgi_application
+    from django.conf import settings
+    from starlette.applications import Starlette
+    from starlette.routing import Mount
+    from starlette.staticfiles import StaticFiles
+
+    static_app = ProtocolTypeRouter({
+        "http": Starlette(routes=[
+            Mount(settings.STATIC_URL, app=StaticFiles(directory=settings.STATIC_ROOT), name='static'),
+            Mount('/', app=django_asgi),
+        ]),
+        "websocket": AuthMiddlewareStack(
+            URLRouter(websocket_urlpatterns)
+        ),
+    })

src/requirements/server-asgi.txt

@@ -0,0 +1,3 @@
+starlette==0.30.0
+uvicorn==0.22.0
+gunicorn==20.1.0