Missing CDN files

[pjotterplotter]

I installed the latest version, but it appears that some of the required frontend libraries are missing for the graphiql frontend:

graphql_app = GraphQLApp(schema=graphene.Schema(query=GraphQLQueries, subscription=Subscription), on_get=make_playground_handler())
app.mount("/graphql", graphql_app)

127.0.0.1/:15 GET https://unpkg.com/graphiql/graphiql.css net::ERR_ABORTED 404
127.0.0.1/:17 GET https://unpkg.com/react-dom@16/umd/react-dom.production.min.js net::ERR_ABORTED 404
127.0.0.1/:22 GET https://unpkg.com/graphiql/graphiql.min.js net::ERR_ABORTED 404
127.0.0.1/:18 GET https://unpkg.com/[email protected]/browser/client.js net::ERR_ABORTED 404
127.0.0.1/:16 GET https://unpkg.com/react@16/umd/react.production.min.js net::ERR_ABORTED 404
127.0.0.1/:17 GET https://unpkg.com/react-dom@16/umd/react-dom.production.min.js net::ERR_ABORTED 404
127.0.0.1/:18 GET https://unpkg.com/[email protected]/browser/client.js net::ERR_ABORTED 404
127.0.0.1/:22 GET https://unpkg.com/graphiql/graphiql.min.js net::ERR_ABORTED 404

Maybe it would also be nice if there is an option to provide custom urls for these libraries, so you could host them yourself or point to another cdn?

PS: there are no problems when using the make_playground_handler