Почему выходит ошибка с fs.readFile?

ar fs = require('fs')

fs.readFile('./content.json', 'utf-8', function(err, data) {
	if (err) throw err;
})

// var webpackUglifyJsPlugin = require('webpack-uglify-js-plugin');

module.exports = {
	node: { net: 'empty',
			tls: 'empty',
			module: 'empty',
		  },
	watch: true,
	entry: {
		mainpage: __dirname + '/src/scripts/mainpage.jsx',
		goods: __dirname + '/src/scripts/goods.jsx',
		common: __dirname + '/src/scripts/common.jsx',
		data_models: __dirname + '/src/scripts/data_models.js'
	},
	output: {
		filename: '[name].js',
		path: __dirname + '/dist/scripts'
	},
	module: {
		rules: [
			{
				test: /(.jsx|.js)$/,
				loader: 'babel-loader',
				exclude: /(node_modules|bower_components)/,
				query: {
					presets: ['es2015', 'react']
				}
			}
		]
	}
};

ERROR in ./src/scripts/data_models.js
Module not found: Error: Can't resolve 'fs' in '/media/monx94/(Внешний жёсткий диск)/ИнтернетМагазин/src/scripts'
 @ ./src/scripts/data_models.js 8:9-22

ERROR in ./src/scripts/dispenser.js
Module not found: Error: Can't resolve 'fs' in '/media/monx94/(Внешний жёсткий диск)/ИнтернетМагазин/src/scripts'
 @ ./src/scripts/dispenser.js 3:9-22
 @ ./src/scripts/components.jsx
 @ ./src/scripts/goods.jsx

ERROR in ./~/mongodb/lib/gridfs/grid_store.js
Module not found: Error: Can't resolve 'fs' in '/media/monx94/(Внешний жёсткий диск)/ИнтернетМагазин/node_modules/mongodb/lib/gridfs'
 @ ./~/mongodb/lib/gridfs/grid_store.js 42:7-20
 @ ./~/mongodb/index.js
 @ ./src/scripts/data_models.js

ERROR in ./~/require_optional/index.js
Module not found: Error: Can't resolve 'fs' in '/media/monx94/(Внешний жёсткий диск)/ИнтернетМагазин/node_modules/require_optional'
 @ ./~/require_optional/index.js 2:7-20
 @ ./~/mongodb-core/lib/topologies/server.js
 @ ./~/mongodb-core/index.js
 @ ./~/mongodb/index.js
 @ ./src/scripts/data_models.js

ERROR in ./~/resolve-from/index.js
Module not found: Error: Can't resolve 'module' in '/media/monx94/(Внешний жёсткий диск)/ИнтернетМагазин/node_modules/resolve-from'
 @ ./~/resolve-from/index.js 3:13-30
 @ ./~/require_optional/index.js
 @ ./~/mongodb-core/lib/topologies/server.js
 @ ./~/mongodb-core/index.js
 @ ./~/mongodb/index.js
 @ ./src/scripts/data_models.js