Update README.md

add notes

examples/plausible/README.md

@@ -1,3 +1,17 @@
 # References
 
 - https://github.com/plausible/analytics
+
+# Notes
+
+You have to place two clickhouse configuration files at the corresponding Docker bind volume mounts before starting the stack:
+
+````
+wget https://raw.githubusercontent.com/plausible/hosting/master/clickhouse/clickhouse-config.xml
+wget https://raw.githubusercontent.com/plausible/hosting/master/clickhouse/clickhouse-user-config.xml
+
+mv clickhouse-config.xml /mnt/docker-volumes/plausible/clickhouse/.
+mv clickhouse-user-config.xml /mnt/docker-volumes/plausible/clickhouse/.
+
+docker compose up
+````