Remix

This guide shows you how to deploy a Remix application on Layer0.

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Install the Layer0 CLI

If you have not already done so, install the Layer0 CLI

npm i -g @layer0/cli # yarn global add @layer0/cli

Create a new Remix app

If you don’t already have a Remix app, create one by running the following:

npx create-remix@latest
# Choose express server
cd project-name

You can verify your app works by running it locally with:

npm run dev

Configuring your Remix app for Layer0

Initialize your project

In the root directory of your project run 0 init:

0 init

This will automatically update your package.json and add all of the required Layer0 dependencies and files to your project. These include:

The @layer0/core package - Allows you to declare routes and deploy your application on Layer0
The @layer0/prefetch package - Allows you to configure a service worker to prefetch and cache pages to improve browsing speed
layer0.config.js - A configuration file for Layer0
routes.js - A default routes file that sends all requests to Remix.

Install @layer0/express

Install @layer0/express by running the following:

npm install @layer0/express

Update Layer0 Configuration

Update layer0.config.js at the root of your project to the following:

// This file was automatically added by layer0 deploy.
// You should commit this file to source control.
module.exports = {
  connector: '@layer0/express',
  express: {
    appPath: './server/index.js',
  },
  includeFiles: {
    public: true,
  },
}

Configure the routes

Update routes.js at the root of your project to the following:

// This file was added by layer0 init.
// You should commit this file to source control.
const ONE_HOUR = 60 * 60
const ONE_DAY = 24 * ONE_HOUR

const { Router } = require('@@layer0/core/router')

module.exports = new Router()
  .match('/', ({ cache }) => {
    cache({
      edge: {
        maxAgeSeconds: ONE_DAY,
      },
      browser: false,
    })
  })
  .match('/example-path', ({ cache }) => {
    // other paths
    cache({
      edge: {
        maxAgeSeconds: ONE_DAY,
      },
      browser: false,
    })
  })
  .match('/build/:path*', ({ cache }) => {
    // route build output files through Layer0
    cache({
      edge: {
        maxAgeSeconds: ONE_DAY,
        forcePrivateCaching: true,
      },
      browser: {
        maxAgeSeconds: 0,
        serviceWorkerSeconds: ONE_DAY,
      },
    })
  })
  .fallback(({ renderWithApp }) => renderWithApp())

Refer to the Routing guide for the full syntax of the routes.js file and how to configure it for your use case.

Run the Remix app locally on Layer0

Create a production build of your app by running the following in your project’s root directory:

npm run build

Run Layer0 on your local machine:

0 run --production

Load the site http://127.0.0.1:3000

Deploying