feat(adguard): add DNS readiness probe

adguardhome/k8s/adguard.yaml

@@ -113,6 +113,13 @@ spec:
               name: dns
             - containerPort: 853
               name: dot
+          readinessProbe:
+            tcpSocket:
+              port: dns
+            initialDelaySeconds: 5
+            periodSeconds: 5
+            successThreshold: 1
+            failureThreshold: 3
           volumeMounts:
             - name: adguard-data
               mountPath: /opt/adguardhome/work