old_contents: var config = {};
  config.annotator = {};
  config.profile = {};
  config.apache2 = {};
  config.protocal = 'http' // options: http or https
  
  // postgres db
  config.postgres = process.env.DATABASE_URL || 'postgres://postgres:<password>@<domain name>:5432/dbmiannotator'; 
  
  // apache2 
  config.apache2.host = '<domain name>';
  config.apache2.port = '80'  // 443 for https
  
  // dbmi annotator 
  config.annotator.host = '<domain name>';
  config.annotator.port = '3000';
  
  // user default profile
  config.profile.def = 'MP';
  config.profile.pluginSetL = [];
  config.profile.userProfile = {};
  
  //article list
  //vlan
  config.article = ['dailymed','pmc','wiley','elsevier','springer','sage','taylor','wolters','future'];
  //public
  //config.article = ['dailymed','pmc';
  
  module.exports = config;
  
new_contents: var config = {};
  config.annotator = {};
  config.profile = {};
  config.apache2 = {};
  config.protocal = 'http' // options: http or https
  
  // postgres db
  config.postgres = process.env.DATABASE_URL || 'postgres://postgres:<password>@<domain name>:5432/dbmiannotator'; 
  
  // apache2 
  config.apache2.host = '<domain name>';
  config.apache2.port = '80'  // 443 for https
  
  // dbmi annotator 
  config.annotator.host = '<domain name>';
  config.annotator.port = '3000';
  
  // user default profile
  config.profile.def = 'MP';
  config.profile.pluginSetL = [];
  config.profile.userProfile = {};
  
  //article list
  //vlan
  config.article = ['dailymed','pmc','wiley','elsevier','springer','sage','taylor','wolters','future', 'test-experiment'];
  //public
  //config.article = ['dailymed','pmc';
  
  module.exports = config;
  
subject: add experiment option to config sample