app.js

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

app.use(cookieParser());
app.use(express.json());
app.use(bodyParser.json());
app.use(cors());

if (process.env.NODE_ENV === "production") {
  app.use(express.static("client/build"));
}

mongoose.connect(
  process.env.MONGO_URI || "mongodb://localhost:27017/mernauth",
  { useNewUrlParser: true, useUnifiedTopology: true },
  () => {
    console.log("successfully connected to database");
  }
);

const userRouter = require("./routes/User");
app.use("/user", userRouter);

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

app.listen(process.env.PORT || 5000, () => {
  console.log("express server started");
});