server.js

const express = require("express");
const mongoose = require("mongoose");
const users = require("./routes/api/users");
const posts = require("./routes/api/posts");
const profile = require("./routes/api/profile");

const passport = require("passport");
const bodyParser = require("body-parser");

const app = express();

app.use(function (req, res, next) {
  res.header("Access-Control-Allow-Origin", "*"); // update to match the domain you will make the request from
  res.header(
    "Access-Control-Allow-Headers",
    "Origin, X-Requested-With, Content-Type, Accept, Authorization"
  );
  next();
});

// body parser middleware
app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

// Database URI
const dbURI = require("./config/keys").mongoURI;

// Connecting to to MongoDB
mongoose
  .connect(dbURI, { useNewUrlParser: true, useUnifiedTopology: true })
  .then(() => console.log("MongoDB Connected!!!"))
  .catch((err) => console.log(err));

// Passport middleware
app.use(passport.initialize());

require("./config/passport")(passport);

// Handling Routes
app.use("/api/users", users);
app.use("/api/profile", profile);
app.use("/api/posts", posts);
// Setting up server
const port = process.env.PORT || 5000;
app.listen(port, () => console.log(`Server started on port: ${port}`));