There are 2 containers to run up. One for oauth2 service and another one for database.
$ docker-compose up oauth2
$ docker-compose down
http://localhost:9000/
POST /auth/registerUser
POST /auth/login
GET /auth/me
POSTGRES_USER: 'api'
POSTGRES_PASSWORD: 'api'
POSTGRES_DB: 'oauth2'
POSTGRES_HOST: localhost
POSTGRES_PORT: 5000