Update README.md

Signed-off-by: Jamil <[email protected]>

README.md

@@ -9,7 +9,9 @@
 
 # Probe
 
-This repo contains the application source for https://probe.sh, a web service for testing WireGuard® connectivity built by the team behind [Firezone](https://www.github.com/firezone/firezone).
+This repo contains the application source for Probe, a web application for testing WireGuard® connectivity built by the team behind [Firezone](https://www.github.com/firezone/firezone).
+
+**Edit** 11/18/24: The probe.sh service has since been take down. If you're looking to self-host the service, see [our fly.toml](https://github.com/firezone/probe/blob/main/fly.toml) for how we ran the service.
 
 ## How it works