In the book, Building Cross-Platform Mobile and Web Apps by Pawan Lingras, please create a step by step how-to for page 217, Chapter 8 programming exercise 4, Body Mass Index Monitor server-side version.

4. Body mass index (BMI) monitor server-side version: We want to change the app that monitors the body mass index of a person based on height on weight so that the data is stored on a server instead of in localStorage. You can model the app based on the server-side Thyroid app. In this chapter, we will only modify the web pages to provide the server-side update functionality. We will defer the node.js programming until the following chapter.

-Modify the password-based entry page to accept a unique ID of the person and an ability to create a new personal ID.

- We already have a menu page with four choices. Add a fifth option to sync the records to the server.