Deploy is successful but app not working on server

[Sam-Olendi]

I'm trying to upload my meteor app to Digital Ocean (Ubuntu 16.04.1 x64). I believe I have the settings right (unless I don't):

module.exports = {
  servers: {
    one: {
      host: '[the ip address]',
      username: 'root',
      password: '[my password]'
    }
  },

  meteor: {
    name: 'pichaprint-meteor',
    path: './',
    docker: {
      image:'kadirahq/meteord:base'
    },
    servers: {
      one: {}
    },
    buildOptions: {
      serverOnly: true,
      debug: true
    },
    env: {
      ROOT_URL: 'http://pichaprint.com'
    },
    deployCheckWaitTime: 60
  },
};

However, I get a silent fail when I try to run mup setup or mup deploy from the .deploy folder. The commands only work when I run them with the following flag:
mup setup --config .deploy/mup.js
mup deploy --config .deploy/mup.js

The final result is:

c:\wamp\www\pichaprint-app\pichaprint-meteor (master) (pichaprint-meteor@)
λ mup setup --config .deploy/mup.js

Started TaskList: Setup Docker
[139.59.181.127] - setup docker
[139.59.181.127] - setup docker: SUCCESS

Started TaskList: Setup Meteor
[139.59.181.127] - Setup Environment
[139.59.181.127] - Setup Environment: SUCCESS

And when I deploy, this is what I get:

c:\wamp\www\pichaprint-app\pichaprint-meteor (master) (pichaprint-meteor@)
λ mup deploy --config .deploy/mup.js
Building App Bundle Locally

Started TaskList: Pushing Meteor
[139.59.181.127] - Pushing Meteor App Bundle to The Server
[139.59.181.127] - Pushing Meteor App Bundle to The Server: SUCCESS
[139.59.181.127] - Pushing the Startup Script
[139.59.181.127] - Pushing the Startup Script: SUCCESS

But when I go to the URL, I get a 502 Bad Response error. What am I missing here?
PS, I'm new to this, so any help would be greatly appreciated.