server.js

//server code

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

//libs
const express = require("express");
const app = express();
const mongoose = require("mongoose");

//connect to mongodb
//promise handling
mongoose
  .connect(process.env.DATABASE_URL, { useNewUrlParser: true })
  .then(() => {
    console.log("Mongoose-Connected to Database");
  })
  .catch((err) => {
    console.log("Not Connected to Database ERROR! ", err);
  });

const db = mongoose.connection;
db.on("error", (error) => console.error(error));
db.on("open", () => console.log("Connected to database"));

app.use(express.json());

const subscribersRouter = require("./routes/subscribers");
app.use("/subscribers", subscribersRouter);

app.listen(3000, () => console.log("Server Running!"));