➜  ~ dokku postgres:info your-database-db
       DSN: postgres://postgres:bf8f1cb443c35cd1ae0a58617ef348cd@dokku-postgres-your-database-db:5432/your_database_db

[database type]://[username]:[password]@[host]:[port]/[database name]

➜  ~ dokku postgres:expose your-database-db
 !     Service is already started
-----> Service tweet-analytics-db exposed on port(s) 17825

username: postgres
password: bf8f1cb443c35cd1ae0a58617ef348cd
hostname: Your-Dokku-Host-URL (Ex. domain.com or IP of your dokku server)
port: 17825