flyio-hello-world

# Fly.io Hello World ## Overview Deploy a minimal app to Fly.io using `fly launch`. Fly.io runs Docker containers on Firecracker microVMs across 30+ regions worldwide. Two paths: `flyctl` CLI (simple) or Machines API (programmatic). ## Instructions ### Step 1: Launch with flyctl ```bash # Create a new directory with a Dockerfile mkdir fly-hello && cd fly-hello cat > Dockerfile << 'EOF' FROM node:20-alpine WORKDIR /app COPY server.js . EXPOSE 3000 CMD ["node", "server.js"] EOF cat > server.js << 'EOF' const http = require('http'); const server = http.createServer((req, res) => { res.writeHead(200, { 'Content-Type': 'application/json' }); res.end(JSON.stringify({ message: 'Hello from Fly.io!', region: process.env.FLY_REGION, app: process.env.FLY_APP_NAME, })); }); server.listen(3000, () => console.log('Listening on :3000')); EOF # Launch — creates app, generates fly.toml, deploys fly launch --name hello-fly --region iad --now ``` ### Step 2: Verify Deployment ```bash # Check status fly status # Open in browser fly open # View logs fly logs # Test with cURL curl https://hello-fly.fly.dev/ # {"message":"Hello from Fly.io!","region":"iad","app":"hello-fly"} ``` ### Step 3: Deploy via Machines API ```typescript const FLY_API = 'https://api.machines.dev'; const headers = { 'Authorization': `Bearer ${process.env.FLY_API_TOKEN}`, 'Content-Type': 'application/json', }; // Create an app const app = await fetch(`${FLY_API}/v1/apps`, { method: 'POST...