connect to database<br><b>ERROR: Unknown MySQL server host 'dpg-db' (-2)</b><br>TRACE: <br><br>SET NAMES utf8mb4<br><b>ERROR: </b><br>TRACE: <br><br>set innodb_lock_wait_timeout=240<br><b>ERROR: </b><br>TRACE: DbSessionHandler:read, :session_start<br><br>START TRANSACTION<br><b>ERROR: </b><br>TRACE: DbSessionHandler:read, :session_start<br><br>select * from eshop_sessions where id='' for update<br><b>ERROR: </b><br>TRACE: DbSessionHandler:read, :session_start<br><br>An Error Occurred. Please try again.