server.js

const express = require("express");
const mongoose = require("mongoose");
const cors = require("cors");
const path = require("path");

const config = require("config");
const routes = require("./routes");

const { MONGO_DB_SECRET } = config;

const app = express();

// ExpressJS Middleware
app.use(express.json());
console.log("process = ", process);
console.log("MONGO = ", MONGO_DB_SECRET);
console.log("node env = ", process.env.NODE_ENV);
// Connect to Mongo
mongoose
    .connect(process.env.MONGO_DB_SECRET, {
        useNewUrlParser: true,
        useUnifiedTopology: true,
    })
    .then(() => console.log("MongoDB Connected ..."))
    .catch((err) => console.log(err));

// For CORS Policy
app.use(cors());

// Redirect all client requests to routes.js file.
app.use(routes);

// Serve static assets if in production
if (process.env.NODE_ENV === "production") {
    // Set static folder
    app.use(express.static("client/build"));

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

const port = process.env.PORT || 5000;

app.listen(port, () => console.log(`Server started on port ${port}`));