Bundle add

When adding gems to a gemfile for a private project we will often just type the gem name and then bundle install, this is not the best way, use bundle add

# Gemfile
source "https://rubygems.org"

gem "sinatra"

bundle install

bundle add <gem_name> will install the gem as well as write the version number to the Gemfile this can save time locking gem versions manually by doing it during the installation process

# Gemfile
source "https://rubygems.org"

gem "sinatra", "~> 3.1"