server.js

const express = require("express");
const helmet = require("helmet");
const dotenv = require("dotenv");
const passport = require("passport");

const server = express();

var allowCrossDomain = function (req, res, next) {
  res.header("Access-Control-Allow-Origin", "*");
  res.header("Access-Control-Allow-Methods", "GET,PUT,POST,DELETE,OPTIONS");
  res.header(
    "Access-Control-Allow-Headers",
    "Content-Type, Authorization, Content-Length, X-Requested-With"
  );

  // intercept OPTIONS method
  if ("OPTIONS" == req.method) {
    res.send(200);
  } else {
    next();
  }
};

server.use(allowCrossDomain);

// load environment variables
dotenv.config();

server.use(helmet());

const app = require("firebase/app");

const firebaseConfig = require("./src/config/firebase");
app.initializeApp(firebaseConfig);

server.use(express.json());
server.use(express.urlencoded({ extended: false }));

server.use((req, res, next) => {
  console.log(
    `${Date().split(" ")[4]}: ${req.method} Request: ${req.originalUrl}`
  );
  next();
});

server.get("/", (req, res) => {
  res.send("Welcome");
});

//Passport Middleware
server.use(passport.initialize());

//Passport Config
const passportConfig = require("./src/config/passport");
passportConfig(passport);

const users = require("./src/routes/api/users");
const friends = require("./src/routes/api/friends");
const feedback = require("./src/routes/api/feedback");

server.use("/api/users", users);
server.use("/api/friends", friends);
server.use("/api/feedback", feedback);

server.listen(process.env.PORT, () => {
  console.log(`Server online on port: ${process.env.PORT}`);
});