Node legacy --debug doesn't work with VSCode in Docker for Mac

[BretFisher]

node --debug when running VSCode without docker (node running directly on Mac) works with break points.

Trying it when node is inside a container looks like it works, but VSCode never stops for breakpoints. Just like this user describes: microsoft/vscode#22306 (comment)

I've followed documentation from:
https://code.visualstudio.com/docs/nodejs/nodejs-debugging
and
https://github.com/weinand/vscode-recipes/tree/master/Docker-TypeScript

And I believe this setup worked in early 2017, but now doesn't.

VSCode 1.12.2
Docker for Mac 17.05.0-ce-mac11
Node 6.10.3

CMD in container: node --debug=5858 ../node_modules/nodemon/bin/nodemon.js
Ports are open and responding
VSCode launch.json config:

        {
            "name": "Attach 5858 --debug",
            "type": "node",
            "request": "attach",
            "protocol": "legacy",
            "port": 5858,
            "address": "localhost",
            "restart": false,
            "sourceMaps": false,
            "outFiles": [],
            "localRoot": "${workspaceRoot}",
            "remoteRoot": "/opt/app"
        }