fix remaining healthchecks

compose.dns-ad-blocker.yaml

@@ -1,5 +1,6 @@
 services:
   dns-ad-blocker:
+    image: oznu/dns-ad-blocker:latest
     container_name: dns-ad-blocker
     environment:
       - AUTO_UPDATE=1
@@ -9,7 +10,6 @@ services:
       - DNSCRYPT_RESOLVER_ADDR=45.76.35.212
       - DNSCRYPT_PROVIDER_KEY=4C84:FB8C:0511:5DFA:5F97:C5ED:0329:1370:C78A:BCD6:4E15:DD53:AB08:DE72:FB84:4ACA
       - WHITELIST=api.segment.io,www.googleapis.com,analytics.google.com
-    image: oznu/dns-ad-blocker:latest
     ports:
       - 192.168.2.201:53:53/udp
     restart: unless-stopped
@@ -19,7 +19,7 @@ services:
       - /opt/dns-ad-blocker/var/log:/var/log
       - /opt/dns-ad-blocker/dnsmasq.hosts:/etc/dnsmasq.hosts
     healthcheck:
-      test: ["CMD", "curl", "-f", "http://localhost:80"]
+      test: ["CMD-SHELL", "nc -z -u localhost 53 || exit 1"]
       interval: 30s
       timeout: 10s
       retries: 3