docs: add docker mcpServer example

Author: calebdw

README.md

@@ -118,6 +118,26 @@ JSON Example:
 }
 ```
 
+If using docker/sail, then you can use the following:
+
+```json
+{
+    "mcpServers": {
+        "laravel-boost": {
+            "command": "docker",
+            "args": [
+                "exec",
+                "-i",
+                "<container-name>",
+                "php",
+                "/path/to/artisan",
+                "boost:mcp"
+            ]
+        }
+    }
+}
+```
+
 ## Contributing
 
 Thank you for considering contributing to Boost! The contribution guide can be found in the [Laravel documentation](https://laravel.com/docs/contributions).