Split backend into multiple files

backend/app.py

@@ -0,0 +1,19 @@
+from fastapi import FastAPI
+from fastapi.security import HTTPBearer
+from fastapi.middleware.cors import CORSMiddleware
+
+# Инициализация FastAPI
+app = FastAPI(title="PixelChat")
+
+# CORS
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["*"],  # В продакшене замените на нужные домены
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+
+# Security для FastAPI
+security = HTTPBearer()