server.js

const express = require("express");
const app = express();
const session = require("express-session");
const flash = require("connect-flash");
const passport = require("passport");
const config = require("config");
const connectDB = require("./config/db");
const passportConfig = require("./config/passport");
const methodOverride = require("method-override");
const mongoSanitize = require("express-mongo-sanitize");
const helmet = require("helmet");
const xss = require("xss-clean");
const hpp = require("hpp");
const rateLimit = require("express-rate-limit");
const cors = require("cors");

// Database Connect
connectDB();

// Body Parser Setup
app.use(
  express.urlencoded({
    extended: true,
  })
);
app.set("view engine", "ejs");
app.use(express.static(__dirname + "/public"));
app.use(methodOverride("_method"));

// Security
app.use(mongoSanitize());
app.use(helmet());
app.use(xss());
app.use(hpp());
const limiter = rateLimit({
  windowMs: 10 * 60 * 1000,
  max: 50,
});
app.use(limiter);
app.use(cors());

// Session Setup
app.use(
  session({
    resave: false,
    secret: config.get("sessionSecret"),
    saveUninitialized: false,
  })
);

// Connect Flash
app.use(flash());
app.use((req, res, next) => {
  res.locals.success = req.flash("success");
  res.locals.error = req.flash("error");
  next();
});

// Passport Setup
passportConfig(passport);
app.use(passport.initialize());
app.use(passport.session());

// Routes
app.get("/", (req, res) => {
  res.render("main/index", {
    user: req.user,
  });
});
app.use("/survey", require("./routes/survey"));
app.use("/auth", require("./routes/auth"));
app.use("/users", require("./routes/user"));

// PORT listen
const PORT = process.env.PORT || 5000;
app.listen(PORT, process.env.IP, () => {
  console.log(`Server started on port ${PORT}`);
});