server.js

// require dependencies
const express = require("express");
const path = require("path");
const favicon = require("serve-favicon");
const morgan = require("morgan");
// initialize the express app
const app = express();

// configure settings
require("dotenv").config();
require("./config/database"); // this ensures that code from the database.js module runs

// mount middleware
app.use(express.json()); // creates req.body
app.use(morgan("dev"));
app.use(favicon(path.join(__dirname, "build", "favicon.ico")));
// use middleware to help express discover the favicon file
app.use(express.static(path.join(__dirname, "build")));
// use middleware to help express discover static assets

// mount routes
app.use(require("./config/checkToken"));

// Put API routes here, before the "catch all" route
app.use("/api/users", require("./routes/api/users"));
app.use("/api/payments", require("./routes/api/payments"));

// "catch all route" - used to always serve index.html
app.get("/*", (req, res) => {
  res.sendFile(path.join(__dirname, "build", "index.html"));
});

// tell the app to listen
const port = process.env.PORT || 3001;
app.listen(port, function () {
  console.log(`Express app is running on port:${port}`);
});