Build and serve frontend UI at root path

Dockerfile

@@ -22,6 +22,9 @@ RUN npm install
 
 COPY . .
 
+# Build frontend
+RUN cd frontend && npm install && npm run build
+
 ENV PYTHONPATH=/app
 ENV PYTHONUNBUFFERED=1
 

service/app.py

@@ -8,6 +8,7 @@ from fastapi.exceptions import RequestValidationError
 from fastapi.responses import JSONResponse, RedirectResponse
 from starlette.exceptions import HTTPException as StarletteHTTPException
 from fastapi.middleware.cors import CORSMiddleware
+from fastapi.staticfiles import StaticFiles
 
 _pkg_root = Path(__file__).resolve().parents[1]
 if str(_pkg_root) not in sys.path:
@@ -73,9 +74,14 @@ def create_app() -> FastAPI:
     if config.enable_legacy_routes:
         app.include_router(base_router)
 
-    @app.get("/", include_in_schema=False)
-    def root_redirect():
-        return RedirectResponse(url="/docs")
+    # Serve built frontend static files
+    frontend_dist = _pkg_root / "frontend" / "dist"
+    if frontend_dist.exists() and frontend_dist.is_dir():
+        app.mount("/", StaticFiles(directory=str(frontend_dist), html=True), name="frontend")
+    else:
+        @app.get("/", include_in_schema=False)
+        def root_redirect():
+            return RedirectResponse(url="/docs")
 
     @app.exception_handler(ApiException)
     async def _handle_api_exception(_: Request, exc: ApiException) -> JSONResponse: