Change location of IRB history file

If you connect to a docker container and run `rails console`, IRB will attempt to record a history file in `/rails/.irb_history`, but this location is not writeable.

Perhaps configuring IRB to record this to `/rails/log/irb_history.log` would be preferable. Users can already do this manually by including a `.irbrc` file in the root of their project, so it may be helpful to create a default one if that file does not exist.