Update deployment guide for agent with compatibility note (#359)

* Update deployment guide for agent with compatibility note

Added note about compatibility with Ubuntu distributions and alternative platforms for deploying agents.

* jha copyedits

* Update docs/pages/agents/deploy-agent.mdx

---------

Co-authored-by: Jennifer Hasegawa <5481259+jhaaaa@users.noreply.github.com>

Author: humanagent

docs/pages/agents/deploy-agent.mdx

@@ -2,15 +2,21 @@
 
 This section covers how to deploy an agent using Railway—a platform many developers prefer for quickly and easily deploying agents. While this tutorial focuses on Railway, you can use any hosting provider that supports Node.js and environment variables.
 
-Alternative platforms include:
+Alternative platforms include: 
 
-- Heroku
-- Fly.io
-- Render
-- Vercel
+- [Fly.io](https://fly.io/)
+- [Heroku](https://www.heroku.com/)
+- [Render](https://render.com/)
+- [Vercel](https://vercel.com)  
 
 Want to contribute a deployment guide for another platform? We welcome [pull requests](https://github.com/xmtp/docs-xmtp-org/blob/main/README.md)!
 
+:::tip
+
+The XMTP Node SDK has been tested on Ubuntu distributions only. While other Debian-based distributions may work, compatibility is not guaranteed.
+
+:::
+
 ## 1. Create a Railway account
 
 Sign up for an account at [Railway](https://railway.app/) if you don't already have one.