simplebank https://github.com/techschool/simplebank migrate cli command https://github.com/golang-migrate/migrate/tree/master/cmd/migrate docker https://hub.docker.com/_/postgres https://docs.docker.com/get-started/08_using_compose/ SQLC https://github.com/sqlc-dev/sqlc Effective go https://go.dev/doc/effective_go#constants Postgres driver https://github.com/lib/pq