Getting an error when deploying to heroku "faliled to load resource 404 " bundle.js

I am trying to deploy my app to heroku but it's throwing this error that I listed in the title. I'm using webpack to bundle the files into the file bundle.js I'm just not sure how to deploy this to heroku so that bundle.js will be available. How do you reconcile webpack with heroku? I am going to attach my db.js file and package.json file.

db.js

var Sequelize = require('sequelize');
var env = process.env.NODE_ENV || 'development';
var sequelize;

if (env === 'production') {
    sequelize = new Sequelize(process.env.DATABASE_URL, {
        dialect: 'postgres'
    }); // This if statement should execute if the app is run on Heroku
} else {
    sequelize = new Sequelize(undefined, undefined, undefined, {
        'dialect': 'sqlite',
        'storage': __dirname + '/data/practice-todo-api.sqlite'
    });
}



var db = {};

db.todo = sequelize.import(__dirname + '/models/todo.js');
db.user = sequelize.import(__dirname + '/models/user.js');
db.token = sequelize.import(__dirname + '/models/token.js');
db.sequelize = sequelize;
db.Sequelize = Sequelize;

db.todo.belongsTo(db.user);
db.user.hasMany(db.todo);

module.exports = db;

package.json

{
  "name": "practice-todo-api",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "start": "node server.js"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "axios": "^0.9.1",
    "bcrypt": "^0.8.5",
    "body-parser": "^1.13.3",
    "crypto-js": "^3.1.5",
    "express": "^4.13.3",
    "jsonwebtoken": "^5.0.5",
    "lodash": "^3.10.1",
    "moment": "^2.11.2",
    "pg": "^4.4.1",
    "pg-hstore": "^2.3.2",
    "react": "^0.14.7",
    "react-dom": "^0.14.7",
    "react-redux": "^4.0.0",
    "react-router": "^2.0.0-rc5",
    "redux": "^3.0.4",
    "redux-form": "^4.1.3",
    "redux-promise": "^0.5.1",
    "request": "^2.60.0",
    "sequelize": "^3.17.1",
    "sqlite3": "^3.1.1",
    "underscore": "^1.8.3"
  },
  "devDependencies": {
    "babel-core": "^6.5.1",
    "babel-loader": "^6.2.2",
    "babel-preset-es2015": "^6.5.0",
    "babel-preset-react": "^6.5.0",
    "babel-preset-stage-0": "^6.5.0",
    "file-loader": "^0.8.5",
    "webpack": "^1.12.13"
  }
}