corrected timezones env variable

speedtest/docker-compose.yml

@@ -14,9 +14,10 @@ services:
       - SPEEDTEST_SERVERS=${SPEEDTEST_SERVERS}
       - SPEEDTEST_PING_URL=${SPEEDTEST_PING_URL}
       - PRUNE_RESULTS_OLDER_THAN=${PRUNE_RESULTS_OLDER_THAN}
-      - TZ=${APP_TIMEZONE}
+      - DISPLAY_TIMEZONE=${APP_TIMEZONE}
     volumes:
       - ./config:/config
     restart: unless-stopped
     labels:
       - diun.enable=true
+networks: {}