Not sure if your still looking at this but, what I have done so far after just getting it up and running is.
Mount Container path /usr/src/app/web/vue/ to host path /mnt/user/appdata/gekko/vue/
Edit the UIconfig.js host under UI: to the IP of my docker container.
const CONFIG = {
headless: false,
api: {
host: '0.0.0.0',
port: 3000,
timeout: 120000 // 2 minutes
},
ui: {
ssl: false,
host: '192.168.0.56',
port: 3000,
path: '/'
},
adapter: 'sqlite'