Added front-end ReactApp, with basic CRUD functionality for Bookmark entries

.gitignore

@@ -221,3 +221,29 @@ logs/
 
 #SpecFlow Autogenerated feature code behind files
 *.feature.cs
+
+# .gitignore from ReactJS
+# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
+
+# dependencies
+/node_modules
+/.pnp
+.pnp.js
+
+# testing
+/coverage
+
+# production
+/build
+
+# misc
+.DS_Store
+.env.local
+.env.development.local
+.env.test.local
+.env.production.local
+
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+.env