ローカルホストでフォームに入力しても、ファイルで空白でセーブされています。どうしたら、新しい情報をセーブできますか？

Contactで入力して、情報を送信し、Subscriberファイルで入力した情報を閲覧できるようにしたいのですが、情報が入ってません。どうしたら、新しい情報をセーブできるでしょうか。index.js, subscriberController.js, contact.ejs,subscriber.ejsのファイルを添付しました。
どうぞよろしくお願いいたします。
index.js

const express = require("express"),
  app = express(),
  mongoose = require("mongoose"),
  Subscriber = require("./models/subscriber"),
  subscribersController = require("./controllers/subscribersController");

mongoose.connect(
    "mongodb://localhost:27017/recipe_db",
    {useNewUrlParser: true}
);
const db = mongoose.connection;
db.once("open", () => {
    console.log("Successfully connected to MongoDB using Mongoose!");
});

var myQuery = Subscriber.findOne({
    name: "Jon Wexler"
})
.where("email", /wexler/);
myQuery.exec((error, data) => {
   if(data) console.log(data.name);
});

app.set("port", process.env.PORT || 3000);
app.set("view engine", "ejs");

app.use(express.json());

app.get("/subscribers", subscribersController.getAllSubscribers,
(req, res, next) => {
    res.render("subscribers", { subscribers: req.data});
});

app.get("/contact", subscribersController.getSubscriptionPage);
app.post("/subscribe", subscribersController.saveSubscriber);

app.listen(app.get("port"), () => {
  console.log(`Server running at http://localhost:${app.get("port")}`
);
});

subscriberController.js

const { rawListeners } = require("../models/subscriber");
const Subscriber = require("../models/subscriber");
exports.getAllSubscribers = (req, res, next) => {
    Subscriber.find( {}, (error, subscribers) => {
        if(error) next(error);
        req.data = subscribers;
        next();
    });
};

exports.getSubscriptionPage = (req, res) => {
    res.render("contact");
};
exports.saveSubscriber = (req, res) => {
    let newSubscriber = new Subscriber({
        name: req.body.name,
        email: req.body.email,
        zipCode: req.body.zipCode,
        vip: req.body.vip
    });
    newSubscriber.save((error, result) => {
        if (error) res.send(error);
        res.render("thanks");
    });
};

subscriber.ejs

<div class="list-container">
    <% subscribers.forEach(s => { %>
        <div class="subscriber">
            <p>
               <span class="item-label">Name:</span> 
                <%= s.name %>
            </p>
            <p>
                <span class="item-label">Email:</span>
                <%= s.email %>
            </p>
            <p>
                <span class="item-label">ZipCode:</span>
                <%= s.zipCode %>
            </p>
            <p>
                <span class="item-label">VIP:</span>
                <%= s.vip %></p>
        <%  }); %>
        </div>
</div>

contact.ejs

<div class="col-sm-6">
    <img src="images/graph.png" alt="">
  </div>
  <div class="col-sm-6">
    <h1>Subscribe!</h1>
    <p>Enter your email if you're interested to learn more:</p>
    <form action="/subscribe" method="post">
      <label for="name">Name</label>
      <input type="text" name="name" value="">
      <br>
      <label for="email">Email</label>
      <input type="email" name="email" value="">
      <br>
      <label for="zipCode">ZipCode</label>
      <input type="text" name="zipCode" value="">
      <br>
      <label for="vip">VIP</label>
      <input type="text" name="vip" value="">
      <br>
      <input type="submit" name="" value="Submit">
    </form>
  </div>