improvement(docs): add support forum and enterprise to welcome page

docs/welcome.md

@@ -10,6 +10,10 @@ To the left you'll find all the different documentation sections. Below you'll f
 
 **If your team has already set up a project for Garden**, and you just need to learn how to use the Garden CLI, you may find it helpful to skip straight to [Installation](./getting-started/1-installation.md) and [Using the CLI](./using-garden/using-the-cli.md), but we do still recommend learning [How Garden Works](./basics/how-garden-works.md) and about [The Stack Graph and the general terminology](./basics/stack-graph.md).
 
+**If you need help as an open source user**, please get in touch via our [community forum](https://community.garden.io/). Our team monitors the forum closely, and we encourage you to reach out with questions about Garden. 
+
+**If you'd like to speak to us about Garden Enterprise**, please contact us [here](https://garden.io/contact). Garden Enterprise includes support with SLAs, onboarding assitance, and technical consulting. [Learn more](https://garden.io/product#enterprise).
+
 Here's a rundown of the different sections (the section links point to the first page of each section):
 
 | Section | Description |