create config file

app/config/app.py

@@ -0,0 +1,27 @@
+import graphene
+from fastapi import FastAPI
+from starlette.graphql import GraphQLApp
+from starlette.middleware.cors import CORSMiddleware
+
+from app.schema.mutations.mutations import Mutations
+from app.schema.queries.todo import TodoQuery
+
+origins = ["*"]
+methods = ["*"]
+headers = ["*"]
+
+
+def create_app() -> FastAPI:
+    app = FastAPI()
+    app.add_middleware(
+        CORSMiddleware,
+        allow_origins=origins,
+        allow_credentials=True,
+        allow_methods=methods,
+        allow_headers=headers,
+    )
+    app.add_route(
+        "/", GraphQLApp(schema=graphene.Schema(query=TodoQuery, mutation=Mutations))
+    )
+
+    return app

app/main.py

@@ -1,25 +1,8 @@
-import graphene
 import uvicorn
-from fastapi import FastAPI
-from starlette.graphql import GraphQLApp
-from starlette.middleware.cors import CORSMiddleware
 
-from app.schema.mutations.mutations import Mutations
-from app.schema.queries.todo import TodoQuery
+from app.config.app import create_app
 
-origins = ["*"]
-
-app = FastAPI()
-app.add_middleware(
-    CORSMiddleware,
-    allow_origins=origins,
-    allow_credentials=True,
-    allow_methods=["*"],
-    allow_headers=["*"],
-)
-app.add_route(
-    "/", GraphQLApp(schema=graphene.Schema(query=TodoQuery, mutation=Mutations))
-)
+app = create_app()
 
 
 if __name__ == "__main__":