setup and run server first, then the client.
$ export DATABASE_URL=postgres://localhost:5432/<db_address>
$ export TOKEN_SECRET=changeme
$ cd server
$ yarn install
$ yarn migrate
$ yarn seed
$ yarn dev
server should be running at http://localhost:3000/graphql
then start the client
$ cd client
$ yarn install
$ yarn start
client should be running at http://localhost:3001/