add some stuff for devise / mail
add admin_mailer

rails g mailer AdminMailer
$EDITOR app/mailers/admin_mailer.rb
(s/from@example\.com/admin@drum-machines.net/)
rails g devise:views
$EDITOR app/views/layouts/_header.html.haml
(logged in as notice)
move seeds task into db/seeds.rb
add sound to notes; add URLS to config/environments
comment Gemfile
add figaro

$EDITOR Gemfile
gem 'figaro'
bundle install
(restart server)
rails g figaro:install
$EDITOR config/application.yaml
cp config/application.yaml config/application.yaml.sample
$EDITOR config/application.yaml.sample
and, add config/application.yml.sample