This is a web application sample which is dockerized. This app uses postgres as its backend storage.
In the world of Docker, we usually take advantage of link to connect containers.
Therefore, in golang-postgres-web-sample, we use the following environment to connect postgres.
POSTGRES_PORT_5432_TCP_ADDR: postgres host address
POSTGRES_PORT_5432_TCP_PORT: postgres host port
USERNAME: postgres username
PASSWORD: postgres password
INSTANCE_NAME: postgres dbname