Welcome to your Rocket.Chat project on Nitrous.
In the Nitrous IDE, enter the following commands in the terminal window:
cd ~/code/Rocket.Chat
meteor --port 0.0.0.0:3000
Now you've got a development server running and can see the output in the Nitrous terminal window. You can open up a new shell or utilize tmux to open new shells to run other commands.
In the Nitrous IDE, open the "Preview" menu and click "Port 3000".