server.js

const dotenv = require("dotenv");
const mongoose = require("mongoose");

//uncaught exceptions
process.on("uncaughtException", (err) => {
  console.log(err.name, err.message);
  console.log("UNCAUGHT EXCEPTION! 🎇 Shutting down");
  process.exit(1);
});

dotenv.config({ path: "./config.env" });
const app = require("./app");

const DB = process.env.DATABASE.replace(
  "<PASSWORD>",
  process.env.DATABASE_PASSWORD
);

mongoose
  .connect(DB, {
    useNewUrlParser: true,
    useCreateIndex: true,
    useFindAndModify: false,
    useUnifiedTopology: true,
  })
  .then(() => console.log("DB connection successful"));

const PORT = process.env.PORT || 3000;
const server = app.listen(PORT, () => {
  console.log(`App running on port ${PORT}`);
});
// console.log(x);
// unhandled rejection
process.on("unhandledRejection", (err) => {
  console.log(err.name, err.message);
  console.log("UNHANDLED REJECTION! 🎇 Shutting down");
  server.close(() => {
    process.exit(1);
  });
});