Add shim documentation to the website.

Add three new doc pages to the website.

- A containerd quick start covering containerd 1.2. This is limited to shim v2
  and runtime class as the docs would get too complicated explaining all the
  combinations that are possible. We want folks to use shim v2 and runtime
  class anyway.
- An advanced configuration page. This covers containerd and
  containerd-shim-runsc-v1's configuration options.
- A page for old versions (i.e. containerd 1.1). Notes that this is deprecated
  and supported on a best-effort basis.

Fixes #3279

PiperOrigin-RevId: 324775563

1 files changed, 6 insertions, 7 deletions

diff --git a/shim/README.md b/shim/README.md
index c6824ebdc..75daf00ac 100644
--- a/shim/README.md
+++ b/shim/README.md
@@ -1,11 +1,10 @@
-# gVisor Containerd shims
+# Shim Overview
 
-There are various shims supported for differt versions of
-[containerd][containerd].
+Integration with containerd is done via a [shim][shims]. There are various shims
+supported for different versions of [containerd][containerd].
 
--   [Configure gvisor-containerd-shim (shim v1) (containerd ≤ 1.2)](v1/configure-gvisor-containerd-shim.md)
--   [Runtime Handler/RuntimeClass Quick Start (containerd >= 1.2)](v2/runtime-handler-quickstart.md)
--   [Runtime Handler/RuntimeClass Quick Start (shim v2) (containerd >= 1.2)](v2/runtime-handler-shim-v2-quickstart.md)
--   [Configure containerd-shim-runsc-v1 (shim v2) (containerd >= 1.3)](v2/configure-containerd-shim-runsc-v1.md)
+-   [Containerd 1.2+ (shim v2)](https://gvisor.dev/docs/user_guide/containerd/quick_start/)
+-   [Containerd 1.1 (shim v1)](https://gvisor.dev/docs/user_guide/containerd/containerd_11/)
 
 [containerd]: https://github.com/containerd/containerd
+[shims]: https://iximiuz.com/en/posts/implementing-container-runtime-shim/