⚡️(asgi) use uvicorn to serve backend

This is a naive first switch from sync to async.
This enables the backend to still answer to incomming requests
while streaming LLM results to the user.

For sure there is room for code cleaning and improvements, but
this provides a nice improvement out of the box.

src/backend/impress/asgi.py

@@ -0,0 +1,18 @@
+"""
+ASGI config for impress project.
+
+It exposes the ASGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/dev/howto/deployment/asgi/
+"""
+
+import os
+
+from configurations.asgi import get_asgi_application
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "impress.settings")
+os.environ.setdefault("DJANGO_CONFIGURATION", "Development")
+os.environ.setdefault("PYTHON_SERVER_MODE", "async")
+
+application = get_asgi_application()

src/backend/impress/wsgi.py

@@ -13,5 +13,6 @@ from configurations.wsgi import get_wsgi_application
 
 os.environ.setdefault("DJANGO_SETTINGS_MODULE", "impress.settings")
 os.environ.setdefault("DJANGO_CONFIGURATION", "Development")
+os.environ.setdefault("PYTHON_SERVER_MODE", "sync")
 
 application = get_wsgi_application()

src/backend/pyproject.toml

@@ -55,12 +55,13 @@ dependencies = [
     "nested-multipart-parser==1.6.0",
     "openai==2.14.0",
     "psycopg[binary]==3.3.2",
-    "pycrdt==0.12.44", 
+    "pycrdt==0.12.44",
     "PyJWT==2.10.1",
     "python-magic==0.4.27",
     "redis<6.0.0",
     "requests==2.32.5",
     "sentry-sdk==2.48.0",
+    "uvicorn==0.40.0",
     "whitenoise==6.11.0",
 ]
 

src/helm/env.d/dev/configuration/theme/demo.json

@@ -135,9 +135,15 @@
     }
   },
   "header": {
+    "logo": {},
     "icon": {
       "src": "/assets/icon-docs.svg",
-      "width": "32px"
+      "style": {
+        "width": "32px",
+        "height": "auto"
+      },
+      "alt": "",
+      "withTitle": true
     }
   },
   "waffle": {
@@ -164,5 +170,26 @@
       ]
     },
     "showMoreLimit": 9
+  },
+  "home": {
+    "with-proconnect": false,
+    "icon-banner": {
+      "src": "/assets/icon-docs.svg",
+      "style": {
+        "width": "64px",
+        "height": "auto"
+      },
+      "alt": ""
+    }
+  },
+  "favicon": {
+    "light": {
+      "href": "/assets/favicon-light.png",
+      "type": "image/png"
+    },
+    "dark": {
+      "href": "/assets/favicon-dark.png",
+      "type": "image/png"
+    }
   }
 }

src/helm/env.d/dev/values.impress.yaml.gotmpl

@@ -91,11 +91,14 @@ backend:
     restartPolicy: Never
 
   command:
-    - "gunicorn"
-    - "-c"
-    - "/usr/local/etc/gunicorn/impress.py"
-    - "impress.wsgi:application"
-    - "--reload"
+    - uvicorn
+    - --app-dir=/app
+    - --host=0.0.0.0
+    - --timeout-graceful-shutdown=300
+    - --limit-max-requests=20000
+    - --lifespan=off
+    - --reload
+    - "impress.asgi:application"
 
   createsuperuser:
     command:
@@ -145,6 +148,9 @@ frontend:
     pullPolicy: Always
     tag: "latest"
 
+  securityContext:
+    runAsNonRoot: false
+
 yProvider:
   replicas: 1