title: webpack build failed
body: <p>I am building an app with react in the front end and nodejs on the backend . y react is packed by webpack and configure my server to run concurrently with the front end. For months, i have been building my app successfully, suddenly my build begins to fail throwing warnings like below followed by errors</p>
  
  <blockquote>
    <p>WARNING in ./server/~/sequelize/lib/sequelize.js Critical
    dependencies: 388:61-74 the request of a dependency is an expression 
    @ ./server/~/sequelize/lib/sequelize.js 388:61-74</p>
  </blockquote>
  
  <p>And errors like</p>
  
  <blockquote>
    <p>ERROR in ./server/models/index.js Module not found: Error: Cannot
    resolve module 'fs' in /PATH/static/server/models</p>
  </blockquote>
  
  <p>My webpack used to be config like below</p>
  
  <pre><code>var path = require('path');
  var webpack = require('webpack');
  
  module.exports = {
      entry: ['babel-polyfill', 'react-hot-loader/patch', path.normalize(__dirname + '/src/index')],
      devtool: 'cheap-module-source-map',
      devServer: {
          hot: true
      },
      output: {
          filename: 'bundle.js',
          publicPath: '/',
          path: path.join(__dirname, 'server')
      },
      module: {
          loaders: [
              {
                  loader: 'babel-loader',
                  test: /\.js$/,
                  exclude: /node_modules/
              },
              {
                  loader: 'style!css',
                  test: /\.css$/,
                  include: [path.resolve(__dirname, 'public', 'css')]
              },
              {
                  test: /\.json$/,
                  loader: "json-loader"
              }
          ],
          plugins: [
              new webpack.NoErrorsPlugin(),
              new webpack.DefinePlugin({
                  //'process.env.NODE_ENV': JSON.stringify('development')
              }),
              new webpack.NamedModulesPlugin(),
              new webpack.HotModuleReplacementPlugin()
          ],
      }
  };
  </code></pre>
  
  <p>ANd my server config below</p>
  
  <pre><code>var webpack = require('webpack');
  var config = require('./webpack.config');
  var path = require('path');
  var express = require('express');
  var app = express();
  const http = require('http');
  const port = process.env.PORT || 3000;
  
  var compiler = webpack(config);
  
  
  require('./server/config/express')(app, port, compiler, config);
  
  const server = http.createServer(app);
  
  // development error handler
  // will print stacktrace
  if (app.get('env') === 'development') {
    app.use(function (err, req, res, next) {
      res.status(err.code || 500)
        .json({
          status: 'error',
          message: err
        });
    });
  }
  
  app.use(function (err, req, res, next) {
    res.status(err.status || 500)
      .json({
        status: 'error',
        message: err.message
      });
  });
  
  server.on('close', () =&gt; {
    models.sequelize.close();
  });
  </code></pre>
  
  <p>My server config above is based in server folder and i wasn't expecting my webpack to build that folder. My build has being working fine for months until 3 days when it suddenly stopped throwing the errors above. It occurs to me that it is building/packaging the server folder which i wasn't expecting.</p>
  
  <p>I then update my babel-loader to </p>
  
  <pre><code> {
     loader: 'babel-loader',
     test: /\.js$/,
     exclude: [/node_modules/, /server/]
  }
  </code></pre>
  
  <p>yet to no avail. I am really confused on how i can best configure this. My development suddenly stopped. Pls any help would be appreciated.</p>