Passthrough of options to graphql playground disabled

[ashtonsix]

This commit 84233d2 broke my code, so I'm staying at rc.5 until fixed:

const graphqlConfigPath = path.resolve(__dirname, '../.graphqlconfig')
const graphqlConfig = JSON.parse(fs.readFileSync(graphqlConfigPath, 'utf8'))
server.applyMiddleware({app, gui: {config: graphqlConfig}})

The graphql config is very important for me because it lets me work with multiple APIs & environments simulaneously.

[evans]

@ashtonsix Thank you for opening the issue! We're most likely going to place the code in #1297 inside of the ApolloServer constructor, so that apollo-server can update them. If you have any feedback, please feel free to weight in

[evans]

With #1297, we can now specify a playground.config 🎉