*: Document development in WSL2 (thanos-io#5927)

* Document development in WSL2

Signed-off-by: Douglas Camata <[email protected]>

* Fix docs lint

Signed-off-by: Douglas Camata <[email protected]>

Signed-off-by: Douglas Camata <[email protected]>

Author: douglascamata

CONTRIBUTING.md

@@ -66,10 +66,14 @@ The following section explains various suggestions and procedures to note during
 
 ### Prerequisites
 
-* It is strongly recommended that you use Linux distributions systems or OSX for development.
+* It is strongly recommended that you use Linux distributions systems or macOS for development.
+* Running [WSL 2 (on Windows)](https://learn.microsoft.com/en-us/windows/wsl/) is also possible. Note that if during development you run a local Kubernetes cluster and have a Service with `service.spec.sessionAffinity: ClientIP`, it will break things until it's removed[^windows_xt_recent].
 * Go 1.19.x or higher.
+* Docker (to run e2e tests)
 * For React UI, you will need a working NodeJS environment and the npm package manager to compile the Web UI assets.
 
+[^windows_xt_recent]: A WSL 2 kernel recompilation is required to enable the `xt_recent` kernel module, used by `iptables` in `kube-proxy` to implement ClientIP session affinity. See [issue in WSL](https://github.com/microsoft/WSL/issues/7124).
+
 ### First Steps
 
 It's key to get familiarized with the style guide and mechanics of Thanos, especially if your contribution touches more than one component of the Thanos distributed system. We recommend: