Convenient link for changing the favicon: https://rubyplus.com/articles/1751-How-to-Add-Favicon-to-Rails-4-2-App-in-5-minutes
User Mailcatcher for local email styling dev: https://mailcatcher.me/
$ gem install mailcatcher
$ mailcatcher
Go to http://localhost:1080/
EventDetail body can be styled with markdown: http://commonmark.org/help/