Update README.md

Update README

Rename files and update README.md

Rename files

Add README.md

Simplify subscription setting on client side

Revert create-react-app to no ssr setting

Add commentCount to show changed Subscription's content

Add a pure apollo server version without explict apollo-server-express

Show subscription on UI

Achieve subscription with apollo server and next standalone server

Use withApolloClient/initApollo to achieve subscription

Try using apollo-server-express and create-react-app to do subscription

Try to add subscription

Use GraphQL query hello on client side