update docker to ruby 3.0

update dependencies

* Update dependencies
* Use Ruby 3.0
* Rubocop changes

update puma

update dependencies

update dependencies

replace travis with github workflows

update dependencies and fix rubocop issues

update dependencies

update dependencies

limit log size in production

Limit the production log to 50MB. If a larger log size is desired then
the environment variable `RAILS_LOG_SIZE` can be set.