Using Mattermost Within a Company Network

I can ping the ip address of the Mac mini (not of the docker ip: 192.168.99.100) successfully from another machine but I can't seem to resolve http://dockerhost:8065 nor http://<ip_address>:8065. However, I can obviously access http://dockerhost:8065 directly from the Mac mini. Again, I'm not a sys admin so it would be great if you could offer any further suggestions.