server.js

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

process.on("uncaughtException", (err) => {
  console.log("UNCAUGHT REJECTION! * * * Shutting down...");
  console.log(err.name, err.message);
  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,
  })
  .then(() => {
    console.log("DB connection successful!");
  });

const port = process.env.PORT || 3000;
const server = app.listen(port, () => {
  console.log(`App running on port ${port}...`);
});

process.on("unhandledRejection", (err) => {
  console.log(err.name, err.message);
  console.log("UNHANDLED REJECTION! * * * Shutting down...");
  server.close(() => {
    process.exit(1);
  });
});

process.on("SIGTERM", () => {
  console.log("* * * SIGTERM RECEIVED. Shutting down gracefully");
  server.close(() => {
    console.log("* * * Process terminated!");
  });
});