index.js

const express = require("express");
const mongoose = require("mongoose");
const morgan = require("morgan");
const cookieParser = require("cookie-parser");
const authRoutes = require("./routes/auth");
const userRoutes = require("./routes/user.js");
const categoryRoutes = require("./routes/category");
const productRoutes = require("./routes/product");
const braintreeRoutes = require("./routes/braintree");
const orderRoutes = require("./routes/order");
const { notFound, errorHandler } = require("./helpers/error");
const keys = require("./config/keys");
const PORT = process.env.PORT || 5000;

// app
const app = express();

//db
mongoose
  .connect(keys.MONGO_URI, {
    useNewUrlParser: true,
    useCreateIndex: true,
    useUnifiedTopology: true,
    useFindAndModify: false,
  })
  .then(() => console.log("database connected"));

// middlewares
app.use(morgan("common"));
app.use(express.json());
app.use(cookieParser());

// routes middleware
app.use("/api", authRoutes);
app.use("/api", userRoutes);
app.use("/api", categoryRoutes);
app.use("/api", productRoutes);
app.use("/api", braintreeRoutes);
app.use("/api", orderRoutes);

if (process.env.NODE_ENV === "production") {
  // Express will serve up production assets
  // like our main.js file or main.css file
  app.use(express.static("client/build"));

  // Express will serve up the index.html file if it doesn't recognize the route
  const path = require("path");
  app.get("*", (req, res) => {
    res.sendFile(path.resolve(__dirname, "client", "build", "index.html"));
  });
}

app.use(notFound);
app.use(errorHandler);

app.listen(PORT, () => {
  console.log(`Server is running on ${PORT}`);
});