2 minutes reading time
Vercel Node.js
Integrations

Vercel with Node.js

Learn how to make Vercel, Node.js, and Dotenv Vault work together. This tutorial assumes you have already created a .env file and synced it.

1. Set up Node.js for Vercel

Set up your Node.js app to work with Vercel.

// index.js
const http = require('http')
const PORT = process.env.PORT || 5000

const server = http.createServer((req, res) => {
  res.write(`Hello ${process.env.HELLO}`)
  res.end()
})

server.listen(PORT, () => {
  console.log(`Server running on ${PORT}`)
})

example

Add vercel.json file.

{
  "version": 2,
  "builds": [
    {
      "src": "index.js",
      "use": "@now/node"
    }
  ],
  "routes": [
    {
      "src": "/(.*)",
      "dest": "index.js"
    }
  ]
}

2. Require dotenv-vault-core

Install dotenv-vault-core.

npm install dotenv-vault-core --save

Require it as early as possible in your Node.js application.

// index.js
require('dotenv-vault-core').config()
console.log(process.env) // for debugging purposes. remove when ready.

const http = require('http')
const PORT = process.env.PORT || 5000

const server = http.createServer((req, res) => {
  res.write(`Hello ${process.env.HELLO}`)
  res.end()
})

server.listen(PORT, () => {
  console.log(`Server running on ${PORT}`)
})

example

3. Run dotenv-vault build

Run npx dotenv-vault build to build your encrypted .env.vault file.

$ npx dotenv-vault build

4. Get DOTENV_KEY

Run npx dotenv-vault keys production.

$ npx dotenv-vault keys production
remote:   Listing .env.vault decryption keys... done

dotenv://:key_1234@dotenv.org/vault/.env.vault?environment=production

5. Set DOTENV_KEY

Visit your Vercel Project > Settings > Environment Variables.

Set DOTENV_KEY to the value returned in step 4.

6. Commit and push

That’s it!

Commit those changes safely to code and push to Vercel.

When the build runs, it will recognize the DOTENV_KEY, decrypt the .env.vault file, and load the production environment variables to ENV. If a DOTENV_KEY is not set (like during development on your local machine) it will fall back to regular dotenv.

Updated Saturday (Nov 26)