server.js

const express = require("express");
const mongoose = require("mongoose");
const app = express();

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

// Including route files
const users = require("./routes/api/users")
const profile = require("./routes/api/profile")

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

/* DB Config */
const db = require("./config/keys").mongoURI;
mongoose
  .connect(
    db,
    { useNewUrlParser: true }
  )
  .then(() => console.log("MongoDB Connected"))
  .catch(err => console.log(err));

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

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

// Using Routes!
app.use("/api/users", users);
app.use("/api/profile", profile);

// Server static assets if in production
if(process.env.NODE_ENV === 'production') {
    // Set static folder
    app.use(express.static('client/build'));
    // Any route use the static folder /index.html
    app.get('*', (req, res) => {
      res.sendFile(path.resolve(__dirname, 'client', 'build', 'index.html'));
    })
  }
  
  // App listens on port 5000
  const port = process.env.PORT || 5000;
  app.listen(port, () => console.log(`Server running on port ${port}`));