chore: use asgi rather than wsgi

By relying on Django Channels and Daphne.
This requires a change in how the application is deployed to take that into account.

pyproject.toml

@@ -28,6 +28,8 @@ classifiers = [
   "Programming Language :: Python :: 3.12",
 ]
 dependencies = [
+  "channels==4.0.0",
+  "daphne==4.1.0",
   "Django==5.1.1",
   "django-agnocomplete==2.2.0",
   "django-environ==0.11.2",

umap/asgi.py

@@ -0,0 +1,16 @@
+import os
+
+from channels.routing import ProtocolTypeRouter
+from django.core.asgi import get_asgi_application
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "umap.settings")
+# Initialize Django ASGI application early to ensure the AppRegistry
+# is populated before importing code that may import ORM models.
+django_asgi_app = get_asgi_application()
+
+application = ProtocolTypeRouter(
+    {
+        "http": django_asgi_app,
+        # Just HTTP for now. (We can add other protocols later.)
+    }
+)

umap/settings/base.py

@@ -19,7 +19,7 @@ env = environ.Env()
 INTERNAL_IPS = env.list("INTERNAL_IPS", default=["127.0.0.1"])
 ALLOWED_HOSTS = env.list("ALLOWED_HOSTS", default=["*"])
 ADMINS = tuple(parseaddr(email) for email in env.list("ADMINS", default=[]))
-
+ASGI_APPLICATION = "umap.asgi.application"
 
 DEBUG = env.bool("DEBUG", default=False)
 
@@ -119,6 +119,7 @@ LANGUAGES = (
 SECRET_KEY = env("SECRET_KEY", default=None)
 
 INSTALLED_APPS = (
+    "daphne",
     "django.contrib.auth",
     "django.contrib.contenttypes",
     "django.contrib.sessions",