DNS: optimize dnsutils installation command

cmdeploy/src/cmdeploy/dns.py

@@ -11,11 +11,7 @@ class DNS:
         self.session = requests.Session()
         self.out = out
         self.ssh = f"ssh root@{mail_domain} -- "
-        try:
-            self.shell(f"apt update")
-            self.shell(f"apt install -y dnsutils")
-        except subprocess.CalledProcessError:
-            pass
+        self.out.shell_output(f"{ self.ssh }'apt-get update && apt-get install -y dnsutils'", timeout=60, no_print=True)
         try:
             self.shell(f"unbound-control flush_zone {mail_domain}")
         except subprocess.CalledProcessError: