Add development instructions to the README

Author: IanWitham

README.md

@@ -2,8 +2,35 @@
 
 This repository hosts [The F# Software Foundation web site](https://fsharp.org/). Pull requests are welcome. The web site code is hosted in the `gh-pages` branch and is created using the tools provided by GitHub:
 
- * Switch to [the `gh-pages` branch](https://github.com/fsharp/fsharp.org/tree/gh-pages)
- * Read [documentation for Github Pages](https://help.github.com/categories/20/articles)
- * The site is using [Jekyll for templating](http://jekyllrb.com/docs/usage/)
+* Switch to [the `gh-pages` branch](https://github.com/fsharp/fsharp.org/tree/gh-pages)
+* Read [documentation for Github Pages](https://help.github.com/categories/20/articles)
+* The site is using [Jekyll for templating](http://jekyllrb.com/docs/usage/)
 
+## Development
 
+The easiest way to get started with this repository is by using the supplied dev container.
+
+### Using the Dev Container
+
+1. Open the repository in Visual Studio Code.
+2. When prompted, reopen the repository in the dev container.
+3. The dev container will automatically set up the development environment.
+
+**Summary of using a dev container:**
+A dev container is a pre-configured development environment that includes all the necessary tools and dependencies. It allows you to start developing without having to manually set up your environment.
+
+If not using VSCode, consult your preferred IDE's documentation for instructions.
+
+To start the development server, run the following command:
+
+```sh
+bundle exec jekyll serve
+```
+
+Or, to enable live reloading:
+
+```sh
+bundle exec jekyll serve -l
+```
+
+The site will be available at `http://localhost:4000`