diff --git a/api/advent22_api/app.py b/api/advent22_api/app.py
index c600709..b0fcc78 100644
--- a/api/advent22_api/app.py
+++ b/api/advent22_api/app.py
@@ -1,4 +1,6 @@
 from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.staticfiles import StaticFiles
 
 from .routers import router
 from .settings import SETTINGS
@@ -19,4 +21,32 @@ app = FastAPI(
     redoc_url=SETTINGS.redoc_url,
 )
 
+
+@app.on_event("startup")
+async def add_middlewares() -> None:
+    if SETTINGS.production_mode:
+        # Mount frontend in production mode
+        app.mount(
+            path="/",
+            app=StaticFiles(
+                directory=SETTINGS.ui_directory,
+                html=True,
+            ),
+            name="frontend",
+        )
+
+    else:
+        # Allow CORS in debug mode
+        app.add_middleware(
+            CORSMiddleware,
+            allow_origins=[
+                "*",
+            ],
+            allow_credentials=True,
+            allow_methods=["*"],
+            allow_headers=["*"],
+            expose_headers=["*"],
+        )
+
+
 app.include_router(router)
diff --git a/api/advent22_api/settings.py b/api/advent22_api/settings.py
index f93e414..644a662 100644
--- a/api/advent22_api/settings.py
+++ b/api/advent22_api/settings.py
@@ -35,6 +35,7 @@ class Settings(BaseSettings):
     #####
 
     production_mode: bool = False
+    ui_directory: str = "/html"
 
     #####
     # openapi settings