docs: Update README.md

examples/watchtower/README.md

@@ -6,3 +6,8 @@
 # Notes
 
 Running multiple Watchtower instances is only possible by using scope definitions. Please read [here](https://containrrr.dev/watchtower/running-multiple-instances/). Otherwise, any new Watchtower container will remove and clean up older instances.
+
+> [!TIP]
+> The provided compose examples make use of a separate socket-proxy container.
+> 
+> Socket Proxy is a security-enhanced proxy, which allows you to apply access rules to the Docker socket, limiting the attack surface for containers such as Watchtower that need to use it.