How to access log?

[luigifab]

After sudo docker pull redmine:6.0 + sudo docker run -d --restart always --name redmine60 -v /var/www/plugins:/usr/src/redmine/plugins -p 3060:3000 redmine:6.0, Redmine is working.

But when I install my plugin, Redmine is crashed!

The problem: I don't understand how to access log...
I tried:

root@3eb3e42fd5cc:/usr/src/redmine# cat config/additional_environment.rb
config.logger = Logger.new(STDOUT)
config.log_level = :debug

But for now this doesn't help me.