DEV: update readme.md for Discourse 3.1 (#23024)

* DEV: update readme.md for Discourse 3.1

* update README.md intro, grammar, add v3.1 screenshot, href links and image width (t/109311)

README.md

@@ -2,18 +2,18 @@
   <img src="images/discourse-readme-logo.png" width="300px">
 </a>
 
-Discourse is the 100% open source discussion platform built for the next decade of the Internet. Use it as a:
+Discourse is the online home for your community. We offer a 100% open source community platform to those who want complete control over how and where their site is run.
 
-- mailing list
-- discussion forum
-- long-form chat room
+Our platform has been battle-tested for over a decade and continues to evolve to meet users’ needs for a powerful community platform. Discourse allows you to create discussion topics and connect using real-time chat, as well as access an ever-growing number of official and community themes. In addition, we offer a wide variety of plugins for features ranging from chatbots powered by [Discourse AI](https://meta.discourse.org/t/discourse-ai/259214) to functionalities like SQL analysis using the [Data Explorer](https://meta.discourse.org/t/discourse-data-explorer/32566) plugin.
 
-To learn more about the philosophy and goals of the project, [visit **discourse.org**](https://www.discourse.org).
+To learn more, visit [**discourse.org**](https://www.discourse.org) and join our support community at [meta.discourse.org](meta.discourse.org).
 
 ## Screenshots
 
+<a href="https://blog.discourse.org/2023/08/discourse-3-1-is-here/"><img alt="Discourse 3.1" src="https://github.com/discourse/discourse/assets/5862206/ae95f963-5ab4-4509-b87a-f9f6e9a109bf" width="720px"></a>
+
+<a href="https://bbs.boingboing.net"><img alt="Boing Boing" src="https://github.com/discourse/discourse/assets/5862206/1413ac96-5d08-40b2-bc8e-27c3f2d3bfe6" width="720px"></a>
 
-<a href="https://bbs.boingboing.net"><img alt="Boing Boing" src="https://user-images.githubusercontent.com/1681963/52239245-04ad8280-289c-11e9-9c88-8c173d4a0422.png" width="720px"></a>
 <a href="https://twittercommunity.com/"><img src="https://user-images.githubusercontent.com/1681963/52239250-04ad8280-289c-11e9-9e42-574f6eaab9d7.png" width="720px"></a>
 
 <img src="https://user-images.githubusercontent.com/1681963/52239118-b304f800-289b-11e9-9904-16450680d9ec.jpg" alt="Mobile" width="414">
@@ -22,11 +22,12 @@ Browse [lots more notable Discourse instances](https://www.discourse.org/custome
 
 ## Development
 
-To get your environment setup, follow the community setup guide for your operating system.
+To get your environment set up, follow the community setup guide for your operating system.
 
 1. If you're on macOS, try the [macOS development guide](https://meta.discourse.org/t/beginners-guide-to-install-discourse-on-macos-for-development/15772).
 1. If you're on Ubuntu, try the [Ubuntu development guide](https://meta.discourse.org/t/beginners-guide-to-install-discourse-on-ubuntu-for-development/14727).
 1. If you're on Windows, try the [Windows 10 development guide](https://meta.discourse.org/t/beginners-guide-to-install-discourse-on-windows-10-for-development/75149).
+1. If you're looking to use a simpler Docker-based install, try the [Docker development guide](https://meta.discourse.org/t/install-discourse-for-development-using-docker/102009).
 
 If you're familiar with how Rails works and are comfortable setting up your own environment, you can also try out the [**Discourse Advanced Developer Guide**](docs/DEVELOPER-ADVANCED.md), which is aimed primarily at Ubuntu and macOS environments.
 
@@ -36,7 +37,7 @@ Before you get started, ensure you have the following minimum versions: [Ruby 3.
 
 If you want to set up a Discourse forum for production use, see our [**Discourse Install Guide**](docs/INSTALL.md).
 
-If you're looking for business class hosting, see [discourse.org/buy](https://www.discourse.org/buy/).
+If you're looking for official hosting, see [discourse.org/pricing](https://www.discourse.org/pricing/).
 
 ## Requirements