index.js

//Imports
import Fastify from 'fastify'
import cors from '@fastify/cors'
import {routes as routesV2} from './src/routes/v2/commonroutes.js'
import {PORT, HOST} from './src/config/env.js'
import errorHandler from './src/middleware/errorHandler.js'
import notFoundHandler from './src/middleware/notFoundHandler.js'

// Instance Fastify Web Service
const app = Fastify({logger : true})

//Configure Port and Host
const port = PORT !== undefined ? PORT : 3000
const host = HOST !== undefined ? HOST : `localhost`

//CORS
await app.register(cors, { 
    origin: '*',
    methods: ['GET', 'POST','PUT','DELETE']
})

//Error Handler Middleware
app.setErrorHandler(errorHandler)

//Not Found Route Handler Middleware
app.setNotFoundHandler(notFoundHandler)

//Register API Routes
app.register(routesV2, {prefix : "/api/v2"})

//This is just a Hello World
app.get('/', async (req, res) => {
  return res.type('text/html').send(`<h1 style="text-align:center; font-family: Helvetica">Hello World</h1>`)
})

//Start Web Service Function
const start = async () => {
  try {
    await app.listen({host: host, port: port})
    console.log(`Web Service deployed on ${host}:${port}`)
  } catch (err) {
    app.log.error(err)
    process.exit(1)
  }
}

//Run
start()