Currently, my Angular project is configured with Express serving my index.html file. As the project progressed, I found the need for a landing page that requires some functionality from the index.html file, such as form input that triggers an API call. How can I configure Express to handle my routes in this scenario? Should I adjust it so that my landing page is also served from Express? Additionally, if I do so, would it be advisable to rename the landing page to 'index.html' and change the name of the main page to something else to maintain good practice?