I haven't found any detailed HOWTO or ready repository so I've cooked this all together myself with some explanations of use in README.md and sample page using Vuetify with GraphQL fetch test:

• https://github.com/ordigital/wagtail_nuxt

For now it works as a developement environment but I'm planning to add some instructions for production soon.

Since local backend and frontend directories are bind to docker containers, it's possible to make changes with live preview!

Enjoy!