[ubuntu] Anyone have expierence troubleshooting Docker containers?

Greetings,
I have a Ubuntu 18.04 VPS that I'm trying to learn Docker on. Currently, I just have an OpenVPN AS container running. (It doesn't run or use the web UI to my knowledge.) Now, I'm trying to run a ZoneMinder container for my security IP cameras. I've done:

docker pull kylejohnson/zoneminder
docker run -p 80:80 --name=zoneminder -d kylejohnson/zoneminder

The container starts without error, but the web server is not reachable. When I check the processes, it appears to be exiting without error. I'm not really sure what the next course of action would be to getting it to work. I've tried running it on different ports like "-p 60:80" and stopping Apache2 on the Ubuntu server.

root@vpn01:~# docker run -p 80:80 --name=zoneminder -d kylejohnson/zoneminder
7e8b3f719e37992abb0396451112777e6e25ff5cbd5d6ecd42 42d98fd4e75adb
root@vpn01:~#
root@vpn01:~# docker ps -a
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
7e8b3f719e37 kylejohnson/zoneminder "/bin/sh -c '/ZoneMi…" 15 seconds ago Exited (0) 3 seconds ago zoneminder
36ed45d73727 kylemanna/openvpn "ovpn_run" 4 days ago Up 4 days 0.0.0.0:1194->1194/udp serene_wright
a9cacf26f72b kylemanna/openvpn "ovpn_run" 4 days ago Exited (0) 4 days ago priceless_almeida
2c37f38b0ae2 linuxserver/openvpn-as "/init" 5 days ago Exited (0) 4 days ago openvpn-as