index.js

const express = require("express");
const bodyParser = require("body-parser");
const mongoose = require("mongoose");
const cookieParser = require("cookie-parser");
const cors = require("cors");
const expressSession = require("express-session");
const morgan = require("morgan");
const path = require("path");

const endpoints = require("./endpoints");
const swaggerUi = require("swagger-ui-express");
const swaggerFile = require("./swagger_output.json");

const app = express();
require("dotenv").config(); // include configurations
const PORT = process.env.PORT || 3000;

// to allow external urls
app.use((req, res, next) => {
	res.header("Access-Control-Allow-Origin", "*");
	next();
});

app.use(morgan("dev"));
// to allow sessions
app.use(
	expressSession({
		secret: process.env.KEY,
		store: new expressSession.MemoryStore(),
		maxAge: 2 * 60 * 60 * 1000, // 2 hr
		resave: true,
		//secure: true, only works with https https://github.com/expressjs/session#options
		saveUninitialized: true,
	})
);

app.use(function (req, res, next) {
	res.header("Access-Control-Allow-Origin", "*");
	next();
});

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

// Make connection with the MongoDB atlas
mongoose.Promise = global.Promise;
mongoose
	.connect(process.env.Mongo_URI, {
		useNewUrlParser: true,
		useUnifiedTopology: true,
		useCreateIndex: true,
		useFindAndModify: false,
	})
	.then(() => {
		console.log("Connected to atlas!");
	})
	.catch((err) => {
		console.log("Index.js: line 20: ");
		console.log(err);
	});

var options = {
	//	customCss: ".swagger-ui .topbar { display: none }",
};

app.use(endpoints);
app.use("/doc", swaggerUi.serve, swaggerUi.setup(swaggerFile, options));
app.use(express.static(path.join(__dirname, "client/build")));
app.get("*", (req, res) => {
	res.sendFile(path.join(__dirname + "/client/build/index.html"));
});

// Start Server
app.listen(PORT, () => {
	console.log(`Server running at http://127.0.0.1:${PORT}/`);
});