Add website contributing guide

Author: ranguli

developers_guide.md

@@ -8,3 +8,4 @@
 * [Code style guidelines](coding_style.md)
 * [Peripheral allocation table](peripheral_table.md)
 * [OpenRTX Communication Protocol](rtxlink.md)
+* [Contributing to the website](website.md)

website.md

@@ -0,0 +1,73 @@
+# Contributing to the OpenRTX website
+
+This page discusses the basic setup for contributing to the OpenRTX website.
+
+1. [Overview](#overview)
+2. [Installing dependencies](#installing-dependencies)
+3. [Obtaining the source code](#obtaining-the-source-code)
+4. [Building and running the website](#building-and-running-the-website)
+5. [Checking your changes for typos](#checking-your-changes-for-typos)
+
+## Overview
+
+The OpenRTX website is a _static site_. This means that content is pre-built and packaged for viewing in a browser without the need for a complex webserver or database configuration. This makes contributing to the website relatively simple, and only requires installing a few packages, many of which you may already have if you have done any kind of development before.
+
+OpenRTX uses the `docsify` static site generator, which converts convert Markdown files into HTML that can be rendered in a browser. This generated output is hosted on GitHub Pages.
+
+---
+
+## Installing dependencies
+
+In order to build and run the website locally, you must have the following packages installed (this process may be specific to your Linux distribution or operating system):
+
+- `git`
+- `nodejs`
+- `npm`
+
+Once you have these installed, you will need to use `npm` to install the `docsify` npm package:
+
+```bash
+npm i docsify -g
+```
+
+You can also install the `cspell` package to check your changes for any spelling errors:
+
+```bash
+npm i cspell -g
+```
+---
+
+## Obtaining the source code
+
+To obtain the source code for the OpenRTX website, clone the GitHub repository using the following command:
+
+```bash
+git clone https://github.com/OpenRTX/openrtx.github.io
+```
+---
+
+## Building and running the website
+
+Once you have cloned the repository, run the following command in the parent directory of the `openrtx.github.io/` repository:
+
+```bash
+docsify serve openrtx.github.io
+```
+In your terminal output you will see the following line:
+
+```bash
+Listening at http://localhost:3000
+```
+
+Open the URL displayed in the terminal output (typically `http://localhost:3000` by default) to view your locally built version of the OpenRTX website.
+
+You can now make changes to the website by editing any of the Markdown (`.md`) files in the `openrtx.github.io/` directory. When a file is modified and saved, your local version of the website should update automatically and show your changes live without needing to refresh your web browser.
+
+---
+
+## Checking your changes for typos
+To check for spelling errors, you can run use the `cspell` command installed earlier. For example, to check for spelling errors in the file you are reading right now, you can run the following command inside the `openrtx.github.io/` directory:
+
+```bash
+cspell website.md
+```