In game, use chat box and write a command like "collect" or "follow".
After launching a minecraft server in version 1.8.2, execute the command:
node index.js
For launching a minecraft server, ie:
java -Xmx1024M -Xms1024M -jar server.jar nogui
If using screen:
screen
For reconnecting to an existing session
screen -ls
screen -r <sesssionId>
Control + A + D for leaving a session without killing it.