Update configurable bot example to match the one in docs

examples/config/base-config.yaml

@@ -1,2 +1,5 @@
-# Message to send when user sends !getmessage
-message: Default configuration active
+# Who is allowed to use the bot?
+whitelist:
+  - "@user:example.com"
+# The prefix for the main command without the !
+command_prefix: hello-world

examples/config/configurablebot.py

@@ -1,5 +1,4 @@
 from typing import Type
-
 from mautrix.util.config import BaseProxyConfig, ConfigUpdateHelper
 from maubot import Plugin, MessageEvent
 from maubot.handlers import command
@@ -7,19 +6,22 @@ from maubot.handlers import command
 
 class Config(BaseProxyConfig):
     def do_update(self, helper: ConfigUpdateHelper) -> None:
-        helper.copy("message")
+        helper.copy("whitelist")
+        helper.copy("command_prefix")
 
 
-class DatabaseBot(Plugin):
+class ConfigurableBot(Plugin):
     async def start(self) -> None:
-        await super().start()
         self.config.load_and_update()
 
+    def get_command_name(self) -> str:
+        return self.config["command_prefix"]
+
+    @command.new(name=get_command_name)
+    async def hmm(self, evt: MessageEvent) -> None:
+        if evt.sender in self.config["whitelist"]:
+            await evt.reply("You're whitelisted 🎉")
+
     @classmethod
     def get_config_class(cls) -> Type[BaseProxyConfig]:
         return Config
-
-    @command.new("getmessage")
-    async def handler(self, event: MessageEvent) -> None:
-        if event.sender != self.client.mxid:
-            await event.reply(self.config["message"])

examples/config/maubot.yaml

@@ -1,11 +1,12 @@
 maubot: 0.1.0
 id: xyz.maubot.databasebot
-version: 1.0.0
+version: 2.0.0
 license: MIT
 modules:
 - configurablebot
 main_class: ConfigurableBot
 database: false
+config: true
 
 # Instruct the build tool to include the base config.
 extra_files: