Added more info about public instance

docs/community/public/index.md

@@ -1,3 +1,29 @@
 # Public instance
 
-This section is under construction.
+There is a publicly available hosted version of the API and all clients.
+
+## When to use public instance
+
+You should use public instance if:
+
+* You need garbage reminders for [Gemeinde Schmitten](https://www.schmitten.de){:target="_blank"}
+* You need a stable bot and API versions with good uptime
+* You want to contribute [locations](locations.md) and/or [entries](entries.md)
+* You need community and developer [support](report.md)
+
+You should **NOT** use public instance if:
+
+* You want to modify the source code
+* You have non-standard garbage types
+* You want to add non-standardized locations
+
+## Start using it
+
+### API
+
+* Endpoint: <https://api.garbagebot.eu>{:target="_blank"}
+* Docs: [Swagger](https://api.garbagebot.eu/docs){:target="_blank"} / [Redoc](https://api.garbagebot.eu/redoc){:target="_blank"}
+
+### Telegram Bot
+
+* Link: <https://t.me/GarbageReminder_Bot>{:target="_blank"}