Deploy MEAN.JS on Google Cloud Platform

I tried to deploy MEAN.JS on Google Cloud Platform (also the KeystoneJS CMS), but it doesn't work. I use the command-line tool online.

In the order, i installed Node.js, MongoDB, bower and grunt, then I try to deploy MEAN.JS :

• Install Node.js : sudo apt-get install curl curl -sL https://deb.nodesource.com/setup | sudo bash - sudo apt-get install -y nodejs nodejs-legacy

• Install MongoDB : sudo apt-key adv --keyserver keyserver.ubuntu.com --recv 7F0CEB10 echo 'deb http://downloads-distro.mongodb.org/repo/debian-sysvinit dist 10gen' | sudo tee /etc/apt/sources.list.d/mongodb.list sudo apt-get update sudo apt-get install -y mongodb-org

• Install bower et Grunt : sudo npm install -g bower sudo npm install -g grunt-cli

• Install MEAN.js : sudo npm install -g generator-meanjs mkdir mean cd mean yo meanjs grunt

Here is the result on the command-line board :

Running "jshint:all" (jshint) task 53 files lint free. Running "csslint:all" (csslint) task 2 files lint free. Running "concurrent:default" (concurrent) task Running "watch" task Running "nodemon:dev" (nodemon) task Waiting... [nodemon] v1.2.1 [nodemon] to restart at any time, enter rs [nodemon] watching: app/views//. gruntfile.js server.js config//.js app/*/*.j s [nodemon] starting node --debug server.js debugger listening on port 5858 NODE_ENV is not defined! Using default development environment js-bson: Failed to load c++ bson extension, using pure JS version Failed to load c++ bson extension, using pure JS version MEAN.JS application started on port 3000

I can define the NODE_ENV variable (test, development, all...) but it's the same problem.

The problem is :
It should work but whan i try to access to my IP:port (in this case 146.148.113.68:3000) : "This webpage is not available".
Is it a problem with the VM, the packages, MEAN.JS ? I have the same problem with the KeystoneJS CMS.

Thanks !