instruction: Create a comprehensive Dockerfile for networking applications with best practices
output: ```dockerfile
  from master
  I1027 22:14:54.040048 5063 proxier.go:294] Adding new service "default/kubernetes:https" at 10.0.0.1:443/TCP
  I1027 22:14:54.040154 5063 proxier.go:294] Adding new service "kube-system/kube-dns:dns" at 10.0.0.10:53/UDP
  I1027 22:14:54.040223 5063 proxier.go:294] Adding new service "kube-system/kube-dns:dns-tcp" at 10.0.0.10:53/TCP
  If you see error messages about not being able to contact the master, you
  should double-check your Node configuration and installation steps.Kube-proxy can run in one of a few modes. In the log listed above, the
  line Using iptables Proxier indicates that kube-proxy is running in
  "iptables" mode. The most common other mode is "ipvs".Iptables modeIn "iptables" mode, you should see something like the following on a Node:iptables-save | grep hostnames
  -A KUBE-SEP-57KPRZ3JQVENLNBR -s 10.244.3.6/32 -m comment --comment "default/hostnames:" -j MARK --set-xmark 0x00004000/0x00004000
  -A KUBE-SEP-57KPRZ3JQVENLNBR -p tcp -m comment --comment "default/hostnames:" -m tcp -j DNAT --to-destination 10.244.3.6:9376
  -A KUBE-SEP-WNBA2IHDGP2BOBGZ -s 10.244.1.7/32 -m comment --comment "default/hostnames:" -j MARK --set-xmark 0x00004000/0x00004000
  -A KUBE-SEP-WNBA2IHDGP2BOBGZ -p tcp -m comment --comment "default/hostnames:" -m tcp -j DNAT --to-destination 10.244.1.7:9376
  -A KUBE-SEP-X3P2623AGDH6CDF3 -s 10.244.2.3/32 -m comment --comment "default/hostnames:" -j MARK --set-xmark 0x00004000/0x00004000
  -A KUBE-SEP-X3P2623AGDH6CDF3 -p tcp -m comment --comment "default/hostnames:" -m tcp -j DNAT --to-destination 10.244.2.3:9376
  -A KUBE-SERVICES -d 10.0.1.175/32 -p tcp -m comment --comment "default/hostnames: cluster IP" -m tcp --dport 80 -j KUBE-SVC-NWV5X2332I4OT4T3
  -A KUBE-SVC-NWV5X2332I4OT4T3 -m comment --comment "default/hostnames:" -m statistic --mode random --probability 0.33332999982 -j KUBE-SEP-WNBA2IHDGP2BOBGZ
  -A KUBE-SVC-NWV5X2332I4OT4T3 -m comment --comment "default/hostnames:" -m statistic --mode random --probability 0.50000000000 -j KUBE-SEP-X3P2623AGDH6CDF3
  -A KUBE-SVC-NWV5X2332I4OT4T3 -m comment --comment "default/hostnames:" -j KUBE-SEP-57KPRZ3JQVENLNBR
  For each port of each Service, there should be 1 rule in KUBE-SERVICES and
  one KUBE-SVC-<hash> chain. For each Pod endpoint, there should be a small
  number of rules in that KUBE-SVC-<hash> and one KUBE-SEP-<hash> chain with
  a small number of rules in it. The exact rules will vary based on your exact
  config (including node-ports and load-balancers).IPVS modeIn "ipvs" mode, you should see something like the following on a Node:ipvsadm -ln
  Prot LocalAddress:Port Scheduler Flags
   -> RemoteAddress:Port Forward Weight ActiveConn InActConn
  ...
  TCP 10.0.1.175:80 rr
   -> 10.244.0.5:9376 Masq 1 0 0
   -> 10.244.0.6:9376 Masq 1 0 0
   -> 10.244.0.7:9376 Masq 1 0 0
  ...
  For each port of each Service, plus any NodePorts, external IPs, and
  load-balancer IPs, kube-proxy will create a virtual server. For each Pod
  endpoint, it will create corresponding real servers. In this example, service
  hostnames(10.0.1.175:80) has 3 endpoints(10.244.0.5:9376,
  10.244.0.6:9376, 10.244.0.7:9376).Is kube-proxy proxying?Assuming you do see one the above cases, try again to access your Service by
  IP
  ```