server.js

//bring in dependencies
const express = require("express");
const mongoose = require("mongoose");
const path = require("path");
const cors = require("cors");

const app = express();

// setting port for deployment and running localhost
const PORT = process.env.PORT || 5000;

app.use(express.urlencoded({ extended: true }));
app.use(express.json());
app.use(cors());

// setting up database connection for deployment and localhost
mongoose
	.connect(process.env.MONGODB_URI || "mongodb://localhost/directory", {
		useNewUrlParser: true,
		useFindAndModify: false,
		useCreateIndex: true,
		useUnifiedTopology: true,
	})
	.then(() => console.log("MongoDB connected..."))
	.catch((err) => console.log(err));

// setting up middleware
if (process.env.NODE_ENV === "production") {
	app.use(express.static("client/build"));

	app.get("*", (req, res) => {
		res.sendFile(path.resolve(__dirname, "client", "build", "index.html"));
	});
}

// bringing in routes
require("./routes/apiRoutes")(app);

app.listen(PORT, function () {
	console.log(`Listening on http://localhost:${PORT}`);
});