Started a fresh 1.0.0 container based rancher installation.
curl on host returns json.
browser / http request hangs while fetching http://192.168.99.100:8080/assets/vendor-e143015690fa1a817a04b5cdabddf4b7.js…
How much RAM does the Host/VM running rancher/server have?
32GB, icore7 
So, more than 512MB then 
Does that URL work with curl? It anything actually transferring (browser dev tools ->Network tab)? JS errors in the Console? It seems odd that it would be able to serve the index HTML but not the JS…
Cleared and restarted everything. Works fine now. Sorry.