pm2.json

{
 /**
   * This is a sample configuration file for PM2
   */

  /**
   * Here we declare the apps that must be managed by PM2
   * All options are listed here:
   * https://github.com/Unitech/PM2/blob/master/ADVANCED_README.md#json-app-declaration
   *
   */
  "apps" : [{
    "name"               : "bang",
    "script"             : "server.js",
    "env": {
      "COMMON_VARIABLE": "true",
      "NODE_ENV": "production",
      "BABEL_DISABLE_CACHE": 1
    },
    "exec_interpreter"   : "node",
    "node_args"          : "--harmony",
    "exec_mode"          : "cluster_mode",
    "instances"          : 2,
    "log_date_format"    : "YYYY-MM-DD HH:mm Z",
    "max_memory_restart" : "700M",
    "merge_logs"         : true,
    "error_file"         : "/var/bang/error.log",
    "out_file"           : "/var/bang/out.log",
    "pid_file"           : "/var/bang/bang.pid",
    "watch"              : false
  }]
}