Added notes to products overview (#25)

* Added notes to products overview

* Trivial change to trigger action

* Test commit

* Changed type "FLask" to "Flask"

* First draft of Products Overview

Co-authored-by: Marcus Baw <[email protected]>

docs/products/products-overview.md

@@ -5,9 +5,60 @@ reviewers: Dr Marcus Baw
 
 # Products Overview
 
+These products exist for different use-cases.
+
+Some are designed to integrate with each other, whilst others have been created as stand-alone products.
+
+## [API Server](./api-server.md)
+
+The **RCPCH Digital Growth Charts** (**RCPCH dGC**) platform centres around a REST API which provides **calculated growth parameters** derived from **supplied child measurements** such as **height** and **weight**.
+
+Click [here](../integrator/getting-started.md) if you wish to integrate the RCPCH dGC API into an application.
+
+## [React Demo Client](./react-client.md)
+
+A [live demonstration](https://growth.rcpch.ac.uk/) of the API and Chart Library Component.
+
+## [React Chart Component](./react-component.md)
+
+A permissively-licensed, open-source React component which **simplifies** the process of **creating a digital growth chart graphic** from the data received from the **RCPCH dGC API**.
+
+## [React Native Client](./react-native.md)
+
+A modern dGC client for mobile, developed by Dr Charles van Lennep, which can be run on **Android** and **iOS**.
+
+
+## [Command-line Tools](./command-line-client.md)
+
+A command-line tool which allows utilisation of the powerful `rcpchgrowth-python` package **growth functions** within the terminal.
+
+## [Python package](./python-library.md)
+
+The Python calculation functions, used to power the RCPCH dGC API, exist in a self-contained library for use in other applications.
+
+Install via `pip`:
+
+``` bash
+pip install rcpchgrowth
+```
+
+## [Google Sheets extension](./google-sheets-plugin.md)
+
+A Google Sheets extension developed using [Google Apps Script](https://developers.google.com/apps-script/guides/sheets). 
+
+This allows accessibility for researchers, hobbyists, and enthusiasts. 
+
+## [Flask/Python Client (deprecated)](./flask(deprecated).md)
+
+Early version of the Growth Charts which simply combined the client and API within the same Flask app.
+
+## [Pricing](./pricing.md)
+
+Information about pricing and commercial use.
+=======
 :octicons-mark-github-16: link to code repo
 :material-web: link to demo / pypi (if exists)
 :fontawesome-brands-npm:
 :fontawesome-brands-python:
 
-## API Server
+## API Server