Results of:
$ sudo lsof -i -P -n | grep LISTEN
dockerd 24584 root 27u IPv6 183032 0t0 TCP *:2377 (LISTEN)
dockerd 24584 root 33u IPv6 182119 0t0 TCP *:7946 (LISTEN)
docker-pr 1914448 root 4u IPv4 523243 0t0 TCP serverip:443 (LISTEN)
docker-pr 1914461 root 4u IPv4 522141 0t0 TCP serverip:80 (LISTEN)
docker-pr 1914487 root 4u IPv4 525865 0t0 TCP serverip:53 (LISTEN)