Logger needs more config

Replace app.enable('quiet') with two options:
1. switch logging between file and stdout
2. log level tuning (enable controller logs, mailer logs, etc)

Look for the logger configuration in the codebase, likely in a config or initialization file. The issue mentions replacing `app.enable('quiet')` with options for output destination (file vs stdout) and log level tuning (controller logs, mailer logs). Start by finding where `enable('quiet')` is used and understand the current logging structure. Check if there are existing tests for logging to ensure changes don't break functionality.

索引モデルが issue の本文から書いたものです。