added timezone

To use the correct timezone add TZ=<Zone> to your .env file

README.md

@@ -35,6 +35,10 @@ GRAFANA_ADMIN_PASSWORD=changeme
 
 # Optional: seconds between ping iterations (default 5)
 #PING_INTERVAL=5
+
+# Optional: timezone for dashboard labels computed in SQL, e.g. the
+# hourly/weekday patterns and the raw data table (default UTC)
+#TZ=Europe/Berlin
 ```
 
 Start the containers: