This API will stream tweets directly from Kafka into GraphQL subscriptions.
yarn install
Note: If this doesn't work, please run the following command (based on Blizzard/node-rdkafka#373 (comment)):
CFLAGS=-I/usr/local/opt/openssl/include LDFLAGS=-L/usr/local/opt/openssl/lib yarn install
yarn start
then navigate to http://localhost:4000 to explore the GraphQL playground.