How to Deploy Express Applications to Packet with Nanobox

Express is a fast, unopinionated, minimalist web framework for Node.js. It is a flexible web application framework that provides a robust set of features for web and mobile applications. Packet offers performant, affordable, bare-metal servers in data centers around the world.

In this article, I'm going to walk through deploying an Express application to Packet using Nanobox. Nanobox uses Docker to build local development and staging environments, as well as scalable, highly-available production environments on Packet.

Before You Begin

If you haven't already, create a free Nanobox account and download Nanobox Desktop.

Setup An Express Project

Prerequisite: This guide assumes you already have Node and NPM installed. If not, you can quickly install Node (which includes NPM) and return.

Where to start:

Starting From Scratch

Express gives you the option of either creating the project yourself, or using the express-generator.

Generate a New Project

Install Express, express-generator, and create a new app:

# install express
npm i -g express

# install express-generator
npm i -g express-generator

# create a new app using the pug (formerly jade) templating engine
express --view=pug nanobox-express

# change into your new app, fetch dependencies, and test it (optional)
cd nanobox-express && npm i && npm start

Jump to configure your app

Create a New Project

From the directory where you want your project to live, create a new project folder with a package.json file and install Express:

# create a new project directory and change into it
mkdir nanobox-express && cd nanobox-express

# init a new project
npm init

# go through the setup guide changing any options you'd like, otherwise defaults
# are fine

# install express and save it as a dependency
npm i express --save

Create a file at the root of your new project called index.js with the following:

const express = require('express')
const app = express()

app.get('/', (req, res) => res.send('Hello Nanobox!'))

app.listen(3000, () => console.log('App listening on port 3000!'))

Configure Your App

Nanobox uses a simple yaml config file called the boxfile.yml to build and configure your app's environment.

Add a boxfile.yml

Create a boxfile.yml in the root of your project with the following:

  engine: nodejs
    - nginx

    nginx: nginx -c /app/etc/nginx.conf
    express: npm start # for "gemerate a mew project"
    # express: node index.js # for "create a new project"

  image: nanobox/postgresql:9.5

NOTE: You may need to modify some boxfile configurations specific to your project (such as the database). You'll find more info on this in the docs and guides.

Test Your App Locally (optional)

Nanobox comes with a local development environment that allows you to run your app locally before you deploy it.

# (optional) add a DNS alias to access your app from the browser
nanobox dns add local express.local

# start your app
npm start # for "gemerate a mew project"
# node index.js # for "create a new project"

If you added a DNS alias, access your app at express.local:3000. If not, access it via the IP provided in the console after you've started your server.

Whenever you exit out of the Nanobox console, it'll shut down your VM and drop you back into your host OS.

Configure Express

IMPORTANT: Whether you created the application yourself or with the generator, there are three important pieces of configuration that every application must have:

  • Your app must bind to all IP's ( Why?
  • Your app must listen on port 8080. Why?
  • Your app must use environment variables (evars) to connect to Nanobox services. Why?

Express binds to by default, so no additional config is needed.

Update the Database Connection

When Nanobox spins up a database, it generates environment variables (evars) for the necessary connection credentials.

Express is pretty free-form when it comes to configuring a database connection. However you choose to configure yours, you can access the following evars:


The following is an example database configuration using Postgres:

Install a Database Adapter

# install your database adapter (in this case, postgres) and save it as a dependency
npm i pg-promise --save

NOTE: If you're using a different database (such as MongoDB) you'll need to install the corresponding adapter.

Create a Database Connection

const host = process.env.DATA_DB_HOST
const user = process.env.DATA_DB_USER
const pass = process.env.DATA_DB_PASS

const pgp = require('pg-promise')(/*options*/)
const db = pgp(`postgres://${user}:${pass}@${host}:5432/database`)

This is a very simple example of a database connection. The actual details will be up to you, based on the requirements of your application.

NOTE: Nanobox provides a default database named gonano, but you're welcome to create your own. Also, Nanobox will always use a service's default port when trying to connect. So in this example use 5432, Postgres' default.

Configure Nginx (optional)

It's recommended to use an Nginx reverse proxy to serve static assets. Most Node frameworks are compiled and served static.

Create an etc/nginx.conf in your project with the following contents:

worker_processes 1;
daemon off;

events {
    worker_connections 1024;

http {
    include /data/etc/nginx/mime.types;
    sendfile on;

    gzip              on;
    gzip_http_version 1.0;
    gzip_proxied      any;
    gzip_min_length   500;
    gzip_disable      "MSIE [1-6]\.";
    gzip_types        text/plain text/xml text/css

    # Proxy upstream to express
    upstream express {

    # Configuration for Nginx
    server {

        # Listen on port 8080
        listen 8080;

        # Settings to serve static files
        location ^~ /static/  {
            root /app/;

        # Serve a static file (ex. favico)
        # outside /static directory
        location = /favico.ico  {
            root /app/favico.ico;

        # Proxy connections to express
        location / {
            proxy_pass         http://express;
            proxy_redirect     off;
            proxy_set_header   Host $host;

That's it! On to the main event, deploying your application!

Setup Your Packet Account

If you haven't already, create a Packet account.

Add a New API Key

In your Packet portal, click on "API Keys" in the left nav and add a new API key.

Add an API Key

Give your key a description, Read/write privileges, and click "Generate".

API Key Details

Copy your API Key's Token. You'll need this later.

API Key Token

Create a New Project

"Projects" are Packet's way of grouping ordered servers under a single payment method. Go to the "Manage" tab in your left nav and create a new project.

Create a New Project

Give it a name and assign it a payment method, then click "Create Project".

Project Name & Payment Method

Click on the "Settings" tab inside your new Project, and copy your Project ID. You will need it.

Create a New Provider Account

In your Nanobox dashboard, go to the Hosting Accounts section of your account admin and click "Add Account", select Packet, and click "Proceed".

Add a New Packet Provider

Enter the required credentials.

Enter Packet Auth Credentials

Click "Verify & Proceed". Name your provider, select your default region, then click "Finalize/Create".

Name Your Provider & Select a Default Region

Launch a New App

Go to the home page of your Nanobox dashboard and click the "Launch New App" button. Select your Packet provider from the dropdown and choose the region in which you'd like to deploy your app.

Select your Packet provider

Confirm and click "Let's Go!" Nanobox will order an server on Packet under your account. When the server is up, Nanobox will provision platform components necessary for your app to run:

  • Load-Balancer: The public endpoint for your application. Routes and load-balances requests to web nodes.
  • Monitor: Monitors the health of your server(s) and application components.
  • Logger: Streams and stores your app's aggregated log stream.
  • Message Bus: Sends app information to the Nanobox dashboard.
  • Warehouse: Storage used for deploy packages, backups, etc.

Once all the platform components are provisioned and running, you're ready to deploy your app.

Stage Your App Locally

Nanobox provides "dry-run" functionality that simulates a full production deploy on your local machine. This step is optional, but recommended. If the app deploys successfully in a dry-run environment, it will work when deployed to your live environment.

nanobox deploy dry-run

More information about dry-run environments is available in the Dry-Run documentation.


Add Your New App as a Remote

From the root of your project directory, add your newly created app as a remote.

nanobox remote add app-name

This connects your local codebase to your live app. More information about the remote command is available in the Nanobox Documentation.

Deploy to Your Live App

With your app added as a remote, you're ready to deploy.

nanobox deploy

Nanobox will compile and package your application code, send it up to your live app, provision all your app's components inside your live server, network everything together, and boom! Your app will be live.

Manage & Scale

Once your app is deployed, Nanobox makes it easy to manage and scale your production infrastructure. In your Nanobox dashboard you'll find health metrics for all your app's servers/containers. Your application logs are streamed in your dashboard and can be streamed using the Nanobox CLI.

Although every app starts out on a single server with containerized components, you can break components out into individual servers and/or scalable clusters through the Nanobox dashboard. Nanobox handles the deep DevOps stuff so you don't have to. Enjoy!

Get in Touch



Nanobox uses Docker to containerize your application within its own private network. Using or localhost (the "loopback" IP) inside of a container will loopback to the container, not the host machine. In order for requests to reach your application, your application needs to listen on all available IP's.

Why Port 8080

Nanobox provides your application with a router that directs traffic through a private network created for your app. The router listens on ports 80 and 443, terminates SSL, and forwards all requests to port 8080.

Note: Your app/framework can listen on a port other than 8080, but you will need to implement a proxy that listens on 8080 and forwards to your custom port.

Why Use Environment Variables

Environment variables serve two purposes:

  • They obscure sensitive information in your codebase. Environment variables referenced in your code are populated at runtime, keeping potentially sensitive values out of your codebase.

  • Due to the dynamic nature of containerized applications, it's hard to predict the host IP of running services. These IP's are subject to change as your infrastructure changes. When creating your infrastructure, Nanobox knows what these values are and creates evars for necessary connection details.

Posted in Express.js, Node.js, Packet, Deployment, Nanobox