First, setup a domain to point to the server such as gitlab.example.com.

Second, follow the procedure at https://gitlab.com/gitlab-org/gitlab-ce/blob/master/doc/install/installation.md till the end of Step 6. Do not proceed with 7 to install Nginx.

If you are using MySQL, remember to setup mysql database.

Third, configure apache2

• Enable proxy_http

  sudo a2enmod proxy_http

• Create gitlab.conf with the following

  <VirtualHost *:80>
          ServerName gitlab.example.com
          #git lab passthrough
          ProxyPass         / http://localhost:8080/
          ProxyPassReverse  / http://localhost:8080/
  </VirtualHost>

• Start apache2

  sudo a2ensite gitlab.conf
  sudo service apache2 reload

• Configure sending emails through smtp. Add the following to /home/git/gitlab/config/environments

  config.action_mailer.delivery_method = :smtp
  config.action_mailer.perform_deliveries = true
  config.action_mailer.raise_delivery_errors = true
  
  config.action_mailer.smtp_settings = {
    :address              => "smtp.gmail.com",
    :port                 => 587,
    :domain               => 'gmail.com',
    :user_name            => 'account@gmail.com',
    :password             => 'password',
    :authentication       =>  :plain,
    :enable_starttls_auto => true
  }