[feature] Document using the hosted alertbot

CHANGELOG.md

@@ -1,3 +1,7 @@
+# March 2023
+
+Change `!url` to display the full webhook url not just the base
+
 # December 2022
 
 * Handle sending an alert to a room where the bot is not allowed to send messages [#2](https://github.com/moan0s/alertbot/issues/2)

README.md

@@ -8,8 +8,16 @@ join the [Alertbot room on matrix](https://matrix.to/#/#alertbot:hyteck.de)
 
 # Getting Started
 
+## OPTION 1: Use provided alertbot
+
+* Create a Matrix room and invite @alertbot:hyteck.de
+* Send `!url` to the room. The bot will answer with the webhook URL
+* Put the Webhook URL into your monitoring solution (see below)
+
+## OPTION 2: Selfhost alertbot
+
 **Prerequisites:**
-* A maubot instance: Please [refer to the docs](https://docs.mau.fi/maubot/usage/setup/index.html) for setting up one
+* A Matrix server where you have access to a maubot instance: Please [refer to the docs](https://docs.mau.fi/maubot/usage/setup/index.html) for setting up one
 * An instance of alertmanager or grafana or a similar alerting program that is able to send webhooks
 
 **Getting the code**
@@ -84,7 +92,7 @@ curl --header "Content-Type: application/json" \
 
 # Local testing Setup
 
-Also you might want to test the bot on your local machine but send webhooks to a public server. To do that use a domain 
+You might want to test the bot on your local machine but send webhooks to a public server. To do that use a domain 
 e.g. webbhook.example.com and configure nginx as reverse proxy for port 4242 for this domain.
 
 ## Connect

alertbot.py

@@ -208,7 +208,7 @@ class AlertBot(Plugin):
     @command.new()
     async def url(self, evt: MessageEvent) -> None:
         """Answers with the url of the webhook"""
-        await evt.reply(f"`{self.webapp_url}/webhook`")
+        await evt.reply(f"`{self.webapp_url}/webhook/{evt.room_id}`")
 
     @command.new()
     async def raw(self, evt: MessageEvent) -> None: