server-template.ts

// import fs from "fs";
import { Server } from "http";

import express from "express";
import cors from "cors";

const app = express();

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

app.post("/perform", async (req, res, next) => {
	const { foo } = req.body;

	try {
		res.status(200).json({ foo });
		return;
	} catch (e) {
		next(e);
	}
});

export const defaultConfig = {
	port: 3000,
	hostname: "localhost",
};

export function startServer({
	port = defaultConfig.port, //
	hostname = "localhost",
} = {}): Server {
	const server = app.listen(port, hostname, async () => {
		const msg = `listening on "http://${hostname}:${port}" @ NODE_ENV "${process.env.NODE_ENV}"`;
		console.log(msg);
	});

	return server;
}

if (!module.parent) {
	startServer();
}