old_contents: import path from 'path';
  import dotenv from 'dotenv';
  import express from 'express';
  import webpack from 'webpack';
  import validator from 'express-validator';
  import { json, urlencoded } from 'body-parser';
  import webpackDevMiddleware from 'webpack-dev-middleware';
  import webpackHotMiddleware from 'webpack-hot-middleware';
  
  import enableRoutes from './routes';
  import webpackConfig from '../webpack.config.babel';
  import { authenticate } from './middleware/middleware';
  
  // Configure dotenv to load environment variables
  dotenv.config();
  
  const app = express();
  const router = express.Router();
  const PORT = process.env.PORT || 4200;
  const NODE_ENV = process.env.NODE_ENV || 'development';
  
  // Set static directory
  const distDir = path.join(__dirname, '../client/assets');
  const htmlFile = path.join(distDir, 'index.html');
  const docsDir = path.resolve(__dirname, '../public');
  const docsHtmlFile = path.join(docsDir, 'index.html');
  
  // Configure middleware
  app.use(urlencoded({ extended: true }));
  app.use(json());
  app.use(validator());
  
  if (NODE_ENV === 'development') {
    const config = webpackConfig(undefined, { mode: 'development' });
    const compiler = webpack(config);
    // Configure webpack middleware for bundling
    app.use(webpackDevMiddleware(compiler, {
      publicPath: config.output.publicPath
    }));
  
    app.use(webpackHotMiddleware(compiler));
  } else {
    // Set public directory
    app.use(express.static(distDir));
    app.use(express.static(docsDir));
  
    app.get('/docs', (request, response) => response.sendFile(docsHtmlFile));
  }
  
  // Enable CORS
  app.use((request, response, next) => {
    response.header('Access-Control-Allow-Origin', '*');
    response.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');
    next();
  });
  
  // Configure routes
  enableRoutes(router);
  app.use('/v1/auth', router);
  app.use('/v1', authenticate, router);
  
  app.get('*', (request, response) => {
    response.status(200).sendFile(htmlFile);
  });
  
  app.listen(PORT, () => { console.info(`🚀 App listening on ${PORT}`) });
  
  export default app;
  
new_contents: import path from 'path';
  import dotenv from 'dotenv';
  import express from 'express';
  import webpack from 'webpack';
  import validator from 'express-validator';
  import { json, urlencoded } from 'body-parser';
  import webpackDevMiddleware from 'webpack-dev-middleware';
  import webpackHotMiddleware from 'webpack-hot-middleware';
  
  import enableRoutes from './routes';
  import webpackConfig from '../webpack.config.babel';
  import { authenticate } from './middleware/middleware';
  
  // Configure dotenv to load environment variables
  dotenv.config();
  
  const app = express();
  const router = express.Router();
  const PORT = process.env.PORT || 4200;
  const NODE_ENV = process.env.NODE_ENV || 'development';
  
  // Set static directory
  const distDir = path.join(__dirname, '../client/assets');
  const htmlFile = path.join(distDir, 'index.html');
  const docsDir = path.resolve(__dirname, '../public');
  const docsHtmlFile = path.join(docsDir, 'index.html');
  
  // Configure middleware
  app.use(urlencoded({ extended: true }));
  app.use(json());
  app.use(validator());
  
  if (NODE_ENV === 'development') {
    const config = webpackConfig(undefined, { mode: 'development' });
    const compiler = webpack(config);
    // Configure webpack middleware for bundling
    app.use(webpackDevMiddleware(compiler, {
      publicPath: config.output.publicPath
    }));
  
    app.use(webpackHotMiddleware(compiler));
  } else {
    // Set public directory
    app.use(express.static(distDir));
    app.use(express.static(docsDir));
  
    app.get('/docs', (request, response) => response.sendFile(docsHtmlFile));
  }
  
  // Enable CORS
  app.use((request, response, next) => {
    response.header('Access-Control-Allow-Origin', '*');
    response.header('Access-Control-Allow-Headers', 'Origin, X-Requested-With, Content-Type, Accept');
    next();
  });
  
  // Configure routes
  enableRoutes(router);
  app.use('/v1/auth', router);
  app.use('/v1', authenticate, router);
  
  app.get('*', (request, response) => {
    response.status(200).sendFile(htmlFile);
  });
  
  app.listen(PORT, () => { console.info(`🚀 App listening on ${PORT}`); });
  
  export default app;
  
subject: add semi colon