feat: enable ORJSONResponse and update FastAPI configuration

main.py

@@ -1,13 +1,16 @@
 from fastapi import FastAPI
 from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import ORJSONResponse
 from starlette.staticfiles import StaticFiles
 
 import routes
 
 origins = ["http://localhost:3000"]
 
-app = FastAPI(separate_input_output_schemas=False)
-
+app = FastAPI(
+    separate_input_output_schemas=True,
+    default_response_class=ORJSONResponse
+)
 
 app.add_middleware(
     CORSMiddleware,