Mupx deployment with Meteor.js fails when "Installing Docker" - meteor

Question

I have Ubuntu 14.04, developing on it and want to have a test server on the same computer. It is ran in Virtual Box.
So I followed all the steps on Github for Mupx setup and watched the video that Meteor.js guide told me to watch it. When I get to command:
mupx setup
it shows me the screen with the error:
nejc#nejc-vb:~/Meteor Projects/CSGO/CSGO-deploy$ mupx setup
Meteor Up: Production Quality Meteor Deployments
------------------------------------------------
Configuration file : mup.json
Settings file : settings.json
“ Checkout Kadira!
It's the best way to monitor performance of your app.
Visit: https://kadira.io/mup ”
Started TaskList: Setup (linux)
[my_public_IP] - Installing Docker
events.js:72
throw er; // Unhandled 'error' event
^
Error: Timed out while waiting for handshake
at null._onTimeout (/usr/local/lib/node_modules/mupx/node_modules/nodemiral/node_modules/ssh2/lib/client.js:138:17)
at Timer.listOnTimeout [as ontimeout] (timers.js:121:15)
My mup.json file looks like this:
{
// Server authentication info
"servers": [
{
"host": "my_public_IP",
"username": "nejc",
"password": "123456",
// or pem file (ssh based authentication)
// WARNING: Keys protected by a passphrase are not supported
//"pem": "~/.ssh/id_rsa"
// Also, for non-standard ssh port use this
//"sshOptions": { "port" : 49154 },
// server specific environment variables
"env": {}
}
],
// Install MongoDB on the server. Does not destroy the local MongoDB on future setups
"setupMongo": true,
// Application name (no spaces).
"appName": "CSGO",
// Location of app (local directory). This can reference '~' as the users home directory.
// i.e., "app": "~/Meteor Projects/CSGO",
// This is the same as the line below.
"app": "/home/nejc/Meteor Projects/CSGO",
// Configure environment
// ROOT_URL must be set to your correct domain (https or http)
"env": {
"PORT": 80,
"ROOT_URL": "http://my_public_IP"
},
// Meteor Up checks if the app comes online just after the deployment.
// Before mup checks that, it will wait for the number of seconds configured below.
"deployCheckWaitTime": 30,
// show a progress bar while uploading.
// Make it false when you deploy using a CI box.
"enableUploadProgressBar": true
}