refactoring db_version choosing
add .ruby-version
was missing "an"
move helper methods to it`s own file
require helpers
move route definitions to separate file: routes.rb
move error handling to separate file: errors.rb
move support files to lib/ directory
move models to lib/ directory too
move temp DB files to separate folder
db folder to be ignored
Move server start-up and environment settings to config.ru. Just to have more concise project.