Build

docker build . -t pgcli

Run and connect to database in local postgres container

docker run -it --rm --link $postgres_container_name:postgres pgcli

or

docker run -it --rm --link $postgres_container_name:postgres pgcli postgresql://$user:$password@$host:$port/$db_name

Run and connect to external database

docker run -it --rm pgcli postgresql://$user:$password@$host:$port/$db_name