server.js

import app from "./app.js"
import Config from "./config/index.js"
import logger from "./config/logger/index.js"
import { connectDB, releaseConnection } from "./config/db/index.js"

const { PORT } = Config

async function startServer () {
  try {
    await connectDB()
    const server = app.listen(PORT, () => {
      logger.info(`Listening on port ${PORT}`)
    })

    // Error handling for EADDRINUSE
    server.on("error", (error) => {
      if (error.code === "EADDRINUSE") {
        logger.error(
          `Port ${PORT} is already in use. Please choose another port.`
        )
      } else {
        logger.error("An error occurred:", error)
      }
      setTimeout(() => process.exit(1), 1000)
    })

    /**********************************************************************************
     *                         Gracefully Shutdown Handling
    **********************************************************************************/
    process.on('SIGTERM', () => {
      logger.info('SIGTERM signal received: closing HTTP server')
      server.close(() => {
        logger.log('HTTP server closed')
      })
      releaseConnection()
    });

    process.on('SIGINT', () => {
      logger.log('SIGINT signal received: closing HTTP server')
      server.close(() => {
        logger.log('HTTP server closed')
      })
      releaseConnection()
    });
  } catch (err) {
    if (err instanceof Error) {
      logger.error(err.message)
      setTimeout(() => process.exit(1), 1000)
    }
  }
}

startServer()