Silences Rails::Rack::LogTailer from tailing everything to the console.

# Gemfile
gem 'silence_log_tailer'

Enable by setting anything to the SILENCE_LOG_TAILER environment variable:

$ echo "export SILENCE_LOG_TAILER=stfu" >> ~/.zprofile
$ source ~/.zprofile
$ rails server

or

$ SILENCE_LOG_TAILER=foo rails server