Wrote end-to-end cypress tests

client/cypress/plugins/index.js

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+/* eslint-disable global-require */
+/* eslint-disable import/no-extraneous-dependencies */
+
+// ***********************************************************
+// This example plugins/index.js can be used to load plugins
+//
+// You can change the location of this file or turn off loading
+// the plugins file with the 'pluginsFile' configuration option.
+//
+// You can read more here:
+// https://on.cypress.io/plugins-guide
+// ***********************************************************
+
+// This function is called when a project is opened or re-opened (e.g. due to
+// the project's config changing)
+
+const webpack = require('@cypress/webpack-preprocessor');
+const webpackOptions = require('../../webpack.config.js');
+
+module.exports = on => {
+  on('file:preprocessor', webpack({ webpackOptions }));
+};