✨ Add docs for GraphQL (#48)

docs/src/graphql/tutorial001.py

@@ -0,0 +1,14 @@
+import graphene
+from fastapi import FastAPI
+from starlette.graphql import GraphQLApp
+
+
+class Query(graphene.ObjectType):
+    hello = graphene.String(name=graphene.String(default_value="stranger"))
+
+    def resolve_hello(self, info, name):
+        return "Hello " + name
+
+
+app = FastAPI()
+app.add_route("/", GraphQLApp(schema=graphene.Schema(query=Query)))