I've looked at this SO question and downloaded the VM for IE11 and VirtualBox. On the host, I call https://localhost:8081 to load the webpage from my local webpack dev server. Inside the VM, I tried calling the gateway to get the page loaded (https://10.0.2.2:8081). The problem I'm having is that the Grails web app that ultimately gets called on my host is using whitelisting and I get a myriad of errors that prevent the page from loading. I think there are also some SSL issues. I've loaded mkcert and a new root testing cert on the host. The host browsers are fine with it, but IE11 in the VM complains about a certificate violation.
If technologies like Browserstack can load the site for testing properly, can I do something similar all locally in Ubuntu? I started looking into proxies and SSH tunnels, but so far I haven't gotten anything to work.