update clickhouse version to one working under arm

Also, previously we used Ubuntu base image.
Now, we're switching to Alpine.

README.md

@@ -1,6 +1,6 @@
 # Plausible Analytics setup examples
 
-This repository acts as a a template to get up and running with [Plausible Analytics](https://github.com/plausible/analytics).
+This repository acts as a template to get up and running with [Plausible Analytics](https://github.com/plausible/analytics).
 
 ### How to use
 

docker-compose.yml

@@ -13,7 +13,7 @@ services:
       - POSTGRES_PASSWORD=postgres
 
   plausible_events_db:
-    image: yandex/clickhouse-server:21.3.2.5
+    image: clickhouse/clickhouse-server:22.6-alpine
     restart: always
     volumes:
       - event-data:/var/lib/clickhouse