Deploying a Fastify App

Fastify is a highly performant, low-overhead web framework for Node.js, designed for building fast and scalable APIs. It features a powerful plugin architecture, built-in schema validation, and a focus on developer experience, making it a great choice for modern backend applications.

This guide explains how to deploy a Fastify application to Klutch.sh, both with and without a Dockerfile. It also covers installation and provides sample code to get started.

Prerequisites

• Node.js 18+
• Git and GitHub account
• Klutch.sh account

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Getting Started: Install Fastify

1. Create a new directory for your app and initialize npm:

   mkdir my-fastify-app
   cd my-fastify-app
   npm init -y

2. Install Fastify:

   npm install fastify

3. Create a basic Fastify app (index.js):

   const fastify = require('fastify')();
   
   const port = process.env.PORT || 3000;
   
   fastify.get('/', async (request, reply) => {
     return 'Hello from Fastify on Klutch.sh!';
   });
   
   fastify.listen({ port, host: '0.0.0.0' }, (err, address) => {
     if (err) throw err;
     console.log(`Server running on ${address}`);
   });

4. Add a start script in your package.json:

   "scripts": {
     "start": "node index.js"
   }

5. Test locally:

   npm start

   Visit http://localhost:3000 to see your app running.

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Deploying Without a Dockerfile

1. Push your Fastify app to a GitHub repository.
2. Log in to Klutch.sh.
3. Create a new project and give it a name.
4. Create a new app:
   • Select your Fastify GitHub repository and branch
   • Set the port to route traffic (usually 3000 for Fastify)
   • Choose region, compute, number of instances, and add any environment variables
5. Add a start script in your package.json as shown above.
6. Click “Create” to deploy. Klutch.sh will build and deploy your app automatically.

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Deploying With a Dockerfile

1. Add a Dockerfile to your project root. Example:

   # Use official Node.js image
   FROM node:18-alpine
   
   # Set working directory
   WORKDIR /app
   
   # Copy package files and install dependencies
   COPY package*.json ./
   RUN npm install --production
   
   # Copy app source
   COPY . .
   
   # Expose port (match your Fastify app)
   EXPOSE 3000
   
   # Start the app
   CMD ["npm", "start"]

2. Push your code (with Dockerfile) to GitHub.
3. In Klutch.sh, follow the same steps to create a project and app, but select the Dockerfile option when prompted.
4. Set the service details and environment variables as needed.
5. Click “Create” to deploy. Klutch.sh will build your Docker image and deploy your app.

Note: Your Fastify app should always listen on the PORT environment variable as shown above.

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Resources

• Klutch.sh Documentation
• Fastify Documentation

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Deploying to Klutch.sh is simple and flexible. Choose the method that best fits your workflow and project requirements.