adding the logic to generate the image

backend/app/main.py

@@ -0,0 +1,24 @@
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+
+from app.api.qr import router as qr_router
+
+
+def create_app() -> FastAPI:
+    app = FastAPI(title="QR Code Service")
+
+    # Open CORS to all origins
+    app.add_middleware(
+        CORSMiddleware,
+        allow_origins=["*"],
+        allow_credentials=True,
+        allow_methods=["*"],
+        allow_headers=["*"],
+    )
+
+    app.include_router(qr_router, prefix="/api/qrcode")
+
+    return app
+
+
+app = create_app()