instruction: Create a comprehensive Dockerfile for networking applications with best practices
output: ```dockerfile
  from the set.SRV recordsSRV Records are created for named ports that are part of normal or headless
  services.For each named port, the SRV record has the form
  _port-name._port-protocol.my-svc.my-namespace.svc.cluster-domain.example.For a regular Service, this resolves to the port number and the domain name:
  my-svc.my-namespace.svc.cluster-domain.example.For a headless Service, this resolves to multiple answers, one for each Pod
  that is backing the Service, and contains the port number and the domain name of the Pod
  of the form hostname.my-svc.my-namespace.svc.cluster-domain.example.PodsA/AAAA recordsKube-DNS versions, prior to the implementation of the
  DNS specification,
  had the following DNS resolution:<pod-IPv4-address>.<namespace>.pod.<cluster-domain>
  For example, if a Pod in the default namespace has the IP address 172.17.0.3,
  and the domain name for your cluster is cluster.local, then the Pod has a DNS name:172-17-0-3.default.pod.cluster.local
  Some cluster DNS mechanisms, like CoreDNS, also provide A records for:<pod-ipv4-address>.<service-name>.<my-namespace>.svc.<cluster-domain.example>
  For example, if a Pod in the cafe namespace has the IP address 172.17.0.3,
  is an endpoint of a Service named barista, and the domain name for your cluster is
  cluster.local, then the Pod would have this service-scoped DNS A record.172-17-0-3.barista.cafe.svc.cluster.local
  Pod's hostname and subdomain fieldsCurrently when a Pod is created, its hostname (as observed
  ```