Update docker prompt (#266)

* Add /var/run/docker.sock for this MCP

Author: slimslenderslacks

prompts/examples/docker.md

@@ -14,4 +14,6 @@ tools:
       image: docker:latest
       command:
         - "{{args|into}}"
+      volumes:
+        - "/var/run/docker.sock:/var/run/docker.sock"
 ---