Index: frontend/node_modules/react-dev-utils/ModuleScopePlugin.js
===================================================================
--- frontend/node_modules/react-dev-utils/ModuleScopePlugin.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/react-dev-utils/ModuleScopePlugin.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,103 @@
+/**
+ * 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 path = require('path');
+const os = require('os');
+
+class ModuleScopePlugin {
+  constructor(appSrc, allowedFiles = []) {
+    this.appSrcs = Array.isArray(appSrc) ? appSrc : [appSrc];
+    this.allowedFiles = new Set(allowedFiles);
+    this.allowedPaths = [...allowedFiles].map(path.dirname).filter(p => path.relative(p, process.cwd()) !== '');
+  }
+
+  apply(resolver) {
+    const { appSrcs } = this;
+    resolver.hooks.file.tapAsync(
+      'ModuleScopePlugin',
+      (request, contextResolver, callback) => {
+        // Unknown issuer, probably webpack internals
+        if (!request.context.issuer) {
+          return callback();
+        }
+        if (
+          // If this resolves to a node_module, we don't care what happens next
+          request.descriptionFileRoot.indexOf('/node_modules/') !== -1 ||
+          request.descriptionFileRoot.indexOf('\\node_modules\\') !== -1 ||
+          // Make sure this request was manual
+          !request.__innerRequest_request
+        ) {
+          return callback();
+        }
+        // Resolve the issuer from our appSrc and make sure it's one of our files
+        // Maybe an indexOf === 0 would be better?
+        if (
+          appSrcs.every(appSrc => {
+            const relative = path.relative(appSrc, request.context.issuer);
+            // If it's not in one of our app src or a subdirectory, not our request!
+            return relative.startsWith('../') || relative.startsWith('..\\');
+          })
+        ) {
+          return callback();
+        }
+        const requestFullPath = path.resolve(
+          path.dirname(request.context.issuer),
+          request.__innerRequest_request
+        );
+        if (this.allowedFiles.has(requestFullPath)) {
+          return callback();
+        }
+        if (this.allowedPaths.some((allowedFile) => {
+          return requestFullPath.startsWith(allowedFile);
+        })) {
+          return callback();
+        }
+        // Find path from src to the requested file
+        // Error if in a parent directory of all given appSrcs
+        if (
+          appSrcs.every(appSrc => {
+            const requestRelative = path.relative(appSrc, requestFullPath);
+            return (
+              requestRelative.startsWith('../') ||
+              requestRelative.startsWith('..\\')
+            );
+          })
+        ) {
+          const scopeError = new Error(
+            `You attempted to import ${chalk.cyan(
+              request.__innerRequest_request
+            )} which falls outside of the project ${chalk.cyan(
+              'src/'
+            )} directory. ` +
+              `Relative imports outside of ${chalk.cyan(
+                'src/'
+              )} are not supported.` +
+              os.EOL +
+              `You can either move it inside ${chalk.cyan(
+                'src/'
+              )}, or add a symlink to it from project's ${chalk.cyan(
+                'node_modules/'
+              )}.`
+          );
+          Object.defineProperty(scopeError, '__module_scope_plugin', {
+            value: true,
+            writable: false,
+            enumerable: false,
+          });
+          callback(scopeError, request);
+        } else {
+          callback();
+        }
+      }
+    );
+  }
+}
+
+module.exports = ModuleScopePlugin;