Index: frontend/node_modules/react-dev-utils/ModuleNotFoundPlugin.js
===================================================================
--- frontend/node_modules/react-dev-utils/ModuleNotFoundPlugin.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/react-dev-utils/ModuleNotFoundPlugin.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,144 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+'use strict';
+
+const chalk = require('chalk');
+const findUp = require('find-up');
+const path = require('path');
+
+class ModuleNotFoundPlugin {
+  constructor(appPath, yarnLockFile) {
+    this.appPath = appPath;
+    this.yarnLockFile = yarnLockFile;
+
+    this.useYarnCommand = this.useYarnCommand.bind(this);
+    this.getRelativePath = this.getRelativePath.bind(this);
+    this.prettierError = this.prettierError.bind(this);
+  }
+
+  useYarnCommand() {
+    try {
+      return findUp.sync('yarn.lock', { cwd: this.appPath }) != null;
+    } catch (_) {
+      return false;
+    }
+  }
+
+  getRelativePath(_file) {
+    let file = path.relative(this.appPath, _file);
+    if (file.startsWith('..')) {
+      file = _file;
+    } else if (!file.startsWith('.')) {
+      file = '.' + path.sep + file;
+    }
+    return file;
+  }
+
+  prettierError(err) {
+    let { details: _details = '', origin } = err;
+
+    if (origin == null) {
+      const caseSensitivity =
+        err.message &&
+        /\[CaseSensitivePathsPlugin\] `(.*?)` .* `(.*?)`/.exec(err.message);
+      if (caseSensitivity) {
+        const [, incorrectPath, actualName] = caseSensitivity;
+        const actualFile = this.getRelativePath(
+          path.join(path.dirname(incorrectPath), actualName)
+        );
+        const incorrectName = path.basename(incorrectPath);
+        err.message = `Cannot find file: '${incorrectName}' does not match the corresponding name on disk: '${actualFile}'.`;
+      }
+      return err;
+    }
+
+    const file = this.getRelativePath(origin.resource);
+    let details = _details.split('\n');
+
+    const request = /resolve '(.*?)' in '(.*?)'/.exec(details);
+    if (request) {
+      const isModule = details[1] && details[1].includes('module');
+      const isFile = details[1] && details[1].includes('file');
+
+      let [, target, context] = request;
+      context = this.getRelativePath(context);
+      if (isModule) {
+        const isYarn = this.useYarnCommand();
+        details = [
+          `Cannot find module: '${target}'. Make sure this package is installed.`,
+          '',
+          'You can install this package by running: ' +
+            (isYarn
+              ? chalk.bold(`yarn add ${target}`)
+              : chalk.bold(`npm install ${target}`)) +
+            '.',
+        ];
+      } else if (isFile) {
+        details = [`Cannot find file '${target}' in '${context}'.`];
+      } else {
+        details = [err.message];
+      }
+    } else {
+      details = [err.message];
+    }
+    err.message = [file, ...details].join('\n').replace('Error: ', '');
+
+    const isModuleScopePluginError =
+      err.error && err.error.__module_scope_plugin;
+    if (isModuleScopePluginError) {
+      err.message = err.message.replace('Module not found: ', '');
+    }
+    return err;
+  }
+
+  apply(compiler) {
+    const { prettierError } = this;
+    compiler.hooks.make.intercept({
+      register(tap) {
+        if (!(tap.name === 'MultiEntryPlugin' || tap.name === 'EntryPlugin')) {
+          return tap;
+        }
+        return Object.assign({}, tap, {
+          fn: (compilation, callback) => {
+            tap.fn(compilation, (err, ...args) => {
+              if (err && err.name === 'ModuleNotFoundError') {
+                err = prettierError(err);
+              }
+              callback(err, ...args);
+            });
+          },
+        });
+      },
+    });
+    compiler.hooks.normalModuleFactory.tap('ModuleNotFoundPlugin', nmf => {
+      nmf.hooks.afterResolve.intercept({
+        register(tap) {
+          if (tap.name !== 'CaseSensitivePathsPlugin') {
+            return tap;
+          }
+          return Object.assign({}, tap, {
+            fn: (compilation, callback) => {
+              tap.fn(compilation, (err, ...args) => {
+                if (
+                  err &&
+                  err.message &&
+                  err.message.includes('CaseSensitivePathsPlugin')
+                ) {
+                  err = prettierError(err);
+                }
+                callback(err, ...args);
+              });
+            },
+          });
+        },
+      });
+    });
+  }
+}
+
+module.exports = ModuleNotFoundPlugin;