Reorganize the docs homepage menu (#13247)

Currently, the main body content of the docs home page links to
sections related to individual resources (Server Access, Application
Access, etc.). For users visiting the docs for the first time, it's
difficult to determine what is involved in getting started with
Teleport.

This change organizes the docs landing page to imply that there is a
progression from one stage of the user's setup to the next.

See #12787

- Add headings for different stages of setting up Teleport.
- Add links to a Getting Started guide for each edition that includes a
  "scope" query so users are given the appropriate scope (this partially
  addresses #12773).
- Edit the initial list of Teleport benefits to be more general and
  encompass more functionality.
- Very light copy-editing of the text in the tile lists at the bottom
  of the page.

docs/pages/index.mdx

@@ -1,53 +1,144 @@
 ---
 title: Introduction to Teleport
-description: How to install and quickly get up and running with Teleport to set up SSH and Kubernetes access to cloud environments.
+description: How to install and quickly get up and running with Teleport.
 h1: Introduction
 layout: tocless-doc
 videoBanner: 0HlyGk8dihM
 ---
 
-## What is Teleport
+Teleport is a certificate authority and access plane for your infrastructure.
+With Teleport you can:
 
-Teleport is a Certificate Authority and an Access Plane for your infrastructure. With Teleport you can:
+- Use a single solution to access your SSH servers, Kubernetes clusters,
+  databases, desktops, and web applications. 
+- Define sophisticated access policies for every component of your infrastructure, with fine-grained audit logs and session recordings.
+- Automatically on– and off-board users via integrations with single sign-on
+  providers like GitHub, Okta, and Google Workspace.
 
-- Set up Single Sign-On and have one place to access your SSH servers, Kubernetes, Databases, Desktops, and Web Apps.
-- Use your favorite programming language to define access policies to your infrastructure.
-- Share and record interactive sessions across all environments.
+## Try out Teleport
+
+Quickly see how Teleport works in one of our demo environments.
+
+<TileSet>
+  <Tile icon="code2" title="Browser Lab" href="https://play.instruqt.com/teleport/invite/rgvuva4gzkon">
+    Try Teleport using our guided interactive labs.
+  </Tile>
+  <Tile icon="integrations" title="Docker Compose Lab" href="./getting-started/docker-compose.mdx">
+    Try Teleport locally using Docker Compose.
+  </Tile>
+    <Tile icon="kubernetes" title="Kubernetes Lab" href="./kubernetes-access/getting-started/local.mdx">
+    See how Teleport runs on Kubernetes with this local lab.
+  </Tile>
+</TileSet>
+
+## Choose an edition
+
+Read one of our Getting Started guides to see how to deploy open source
+Teleport, Teleport Enterprise, or Teleport Cloud.
+
+You can also [compare Teleport editions](faq.mdx#how-is-open-source-different-from-enterprise).
+
+<TileSet>
+  <Tile 
+  icon="stack"
+  title="Open Source Teleport"
+  href="./getting-started/linux-server/?scope=oss"
+  >
+
+  Learn how to host your own open source Teleport deployment on a standalone
+  Linux server.
+
+  </Tile>
+  <Tile
+  icon="building"
+  title="Teleport Enterprise"
+  href="./enterprise/introduction.mdx/?scope=enterprise"
+  >
+
+  Get started with a self-hosted Teleport Enterprise deployment, which gives you
+  more advanced features and full customization.
+
+  </Tile>
+
+  <Tile icon="cloud" title="Teleport Cloud" href="./cloud/getting-started/?scope=cloud">
+
+    Try Teleport hosted by us in the cloud for free.
+
+  </Tile>
+</TileSet>
+
+## Configure access
+
+Secure your infrastructure while keeping your engineers productive.
+
+<TileSet>
+<ScopedBlock scope={["cloud", "enterprise"]}>
+<Tile
+  title="Set up SSO"
+  icon="list"
+  href="./enterprise/sso.mdx"
+>
+
+Configure Teleport's integration with your SSO provider so you can automatically
+on– and off-board users.
+
+</Tile>
+</ScopedBlock>
+<ScopedBlock scope={["oss"]}>
+<Tile
+  title="Set up SSO"
+  icon="github"
+  href="./setup/admin/github-sso.mdx"
+>
+
+Configure Teleport's integration with GitHub so you can automatically on– and
+off-board users.
+
+</Tile>
+</ScopedBlock>
+<Tile
+  title="Define roles"
+  icon="lock"
+  href="./access-controls/guides/role-templates.mdx"
+>
+
+Manage who can access which parts of your infrastructure.
+
+</Tile>
+</TileSet>
+
+## Add your infrastructure
+
+Use Teleport to provide secure access to all of your infrastructure.
 
 <TileSet>
   <Tile icon="bolt" title="Server Access" href="./getting-started.mdx">
-    Single Sign-On, short-lived certificates, and audit for SSH servers.
+    Single sign-on, short-lived certificates, and auditing for SSH servers.
   </Tile>
   <Tile icon="window" title="Application Access" href="./application-access/introduction.mdx">
-    Provide secure access to internal dashboards and web applications.
+    Secure access to internal dashboards and web applications.
   </Tile>
   <Tile icon="kubernetes" title="Kubernetes Access" href="./kubernetes-access/introduction.mdx">
-    Single Sign-On, audit and unified access for Kubernetes clusters.
+    Single sign-on, auditing, and unified access for Kubernetes clusters.
   </Tile>
   <Tile icon="database" title="Database Access" href="./database-access/introduction.mdx">
     Secure access to SQL and NoSQL databases.
   </Tile>
   <Tile icon="desktop" title="Desktop Access" href="./desktop-access/introduction.mdx">
     Secure browser-based access to desktop environments.
   </Tile>
-  <Tile icon="cloud" title="Cloud" href="./cloud/introduction.mdx">
-    Connect your nodes, web apps, Kubernetes clusters and databases to Teleport as a service.
-  </Tile>
-  <Tile icon="building" title="Enterprise" href="./enterprise/introduction.mdx">
-    OIDC, SAML, compliance controls and commercial support.
-  </Tile>
 </TileSet>
 
 <TileSet>
   <TileList title="Reach out" icon="question">
   <TileListItem href="https://github.com/gravitational/teleport/discussions">
-    Ask a question in the discussions forum.
+    Ask a question in the discussion forum.
     </TileListItem>
   <TileListItem href="https://goteleport.com/slack">
     Join our Slack channel to get help with your setup.
   </TileListItem>
   <TileListItem href="https://github.com/gravitational/teleport/">
-    Create an issue in GitHub.
+    Create an issue on GitHub.
   </TileListItem>
   <TileListItem href="https://goteleport.com/get-started/">
     Reach out to sales for a demo of Teleport Enterprise.
@@ -58,24 +149,21 @@ Teleport is a Certificate Authority and an Access Plane for your infrastructure.
   </TileList>
   <TileList title="For security teams" icon="lock">
     <TileListItem href="./server-access/guides/openssh.mdx">
-     Capture sessions and manage certificates for existing OpenSSH fleet.
+     Capture sessions and manage certificates for an existing OpenSSH fleet.
     </TileListItem>
     <TileListItem href="./architecture/authentication.mdx#issuing-user-certificates">
       Replace static keys and passwords with short-lived certificates.
     </TileListItem>
-    <TileListItem href="./setup/reference/cli.mdx#tsh-play">
-     Gather structured events and session recording/replay for `ssh`, `kubectl` and desktop interactions.
-     </TileListItem>
     <TileListItem href="./access-controls/guides/webauthn.mdx">
-     Enforce two-factor auth with WebAuthn or TOTP.
+     Enforce two-factor authentication for all of your infrastructure.
     </TileListItem>
   </TileList>
   <TileList title="For developers" icon="stack">
     <TileListItem href="./user-manual.mdx#sharing-sessions">
       Collaborate through session sharing.
     </TileListItem>
     <TileListItem href="./setup/admin/labels.mdx">
-      Discover servers and clusters with dynamic node labels.
+      Discover servers and clusters with dynamic labels.
     </TileListItem>
     <TileListItem href="./setup/admin/adding-nodes.mdx#adding-a-node-located-behind-nat">
      Connect to computing resources located behind firewalls or without static IPs.