Index: frontend/node_modules/react-dev-utils/getPublicUrlOrPath.js
===================================================================
--- frontend/node_modules/react-dev-utils/getPublicUrlOrPath.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
+++ frontend/node_modules/react-dev-utils/getPublicUrlOrPath.js	(revision 9af201e94b5a79beb92a30858fc54de4bc3b9449)
@@ -0,0 +1,65 @@
+/**
+ * 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 { URL } = require('url');
+
+module.exports = getPublicUrlOrPath;
+
+/**
+ * Returns a URL or a path with slash at the end
+ * In production can be URL, abolute path, relative path
+ * In development always will be an absolute path
+ * In development can use `path` module functions for operations
+ *
+ * @param {boolean} isEnvDevelopment
+ * @param {(string|undefined)} homepage a valid url or pathname
+ * @param {(string|undefined)} envPublicUrl a valid url or pathname
+ * @returns {string}
+ */
+function getPublicUrlOrPath(isEnvDevelopment, homepage, envPublicUrl) {
+  const stubDomain = 'https://create-react-app.dev';
+
+  if (envPublicUrl) {
+    // ensure last slash exists
+    envPublicUrl = envPublicUrl.endsWith('/')
+      ? envPublicUrl
+      : envPublicUrl + '/';
+
+    // validate if `envPublicUrl` is a URL or path like
+    // `stubDomain` is ignored if `envPublicUrl` contains a domain
+    const validPublicUrl = new URL(envPublicUrl, stubDomain);
+
+    return isEnvDevelopment
+      ? envPublicUrl.startsWith('.')
+        ? '/'
+        : validPublicUrl.pathname
+      : // Some apps do not use client-side routing with pushState.
+        // For these, "homepage" can be set to "." to enable relative asset paths.
+        envPublicUrl;
+  }
+
+  if (homepage) {
+    // strip last slash if exists
+    homepage = homepage.endsWith('/') ? homepage : homepage + '/';
+
+    // validate if `homepage` is a URL or path like and use just pathname
+    const validHomepagePathname = new URL(homepage, stubDomain).pathname;
+    return isEnvDevelopment
+      ? homepage.startsWith('.')
+        ? '/'
+        : validHomepagePathname
+      : // Some apps do not use client-side routing with pushState.
+      // For these, "homepage" can be set to "." to enable relative asset paths.
+      homepage.startsWith('.')
+      ? homepage
+      : validHomepagePathname;
+  }
+
+  return '/';
+}