Starting application

1. Remove Gemfile.lock

2. Add into Gemfile

   # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
   gem 'tzinfo-data', platforms: [:mingw, :mswin]
   

3. Install all packets:

   $ bundle install

4. Make migration:

   $ rake db:migrate RAILS_ENV=development

5. Start server:

   $ rails s