Forwarding an lxd container's Rails app to a remote laptop

I'm on my laptop. git.curlydogsystems.com is an ubuntu box with lxd containers running.
In one of the containers, currently at 10.59.108.168, I'm running a Rails app.
10.59.108.168 is only visible from git.curlydogsystems.com; I can't see it from my laptop.
The Rails app runs on the default port 3000 in the container. I want it at 3030 on my laptop.

    ssh -L 3030:10.59.108.168:3000 -N git.curlydogsystems.com

The other way to do this is to have nginx on git.curlydogsystes.com proxy the http requests to
the container. This works. But I'm getting odd errors. When I go to Ohana's /admin/whatever routes,
the Rails app can't recognize the request routes. Something about the proxying is confusing it.
Running through the ssh proxy fixes the problem.

I can also ssh directly into it from my laptop by adding this to my laptop's .ssh/config:

    Host ohanadev
      user ubuntu
      HostName 10.59.108.168
      ProxyCommand ssh git.curlydogsystems.com -W %h:%p
      
I added my public key from my laptop to the container's ubuntu user's .ssh/authorized_keys

Update: also, make sure that the Rails app is listening on more than localhost. Jeez.

    rails s -b 0.0.0.0