rvm-passenger for load balance

sudo apt-get update
sudo apt-get install git-core curl zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev python-software-properties libffi-dev -y
sudo apt-get install -y curl gnupg build-essential

gpg --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3
curl -sSL https://get.rvm.io | sudo bash -s stable
sudo usermod -a -G rvm `whoami`

if sudo grep -q secure_path /etc/sudoers; then sudo sh -c "echo export rvmsudo_secure_path=1 >> /etc/profile.d/rvm_secure_path.sh" && echo Environment variable installed; fi

# lastest version
rvm install ruby
rvm --default use ruby
# specific version
rvm install ruby-X.X.X
rvm --default use ruby-X.X.X

gem install bundler --no-rdoc --no-ri

sudo apt-get install -y nodejs &&
sudo ln -sf /usr/bin/nodejs /usr/local/bin/node

sudo apt-get install -y git

gem install bundler
gem install rails