Tried to make an app. That requires yarn. Yarn stopped because I have Node.js version 12 and version 10 is expected!!!
Are they serious?
You can try Theia via Gitpod: https://dev.to/svenefftinge/continuous-dev-environments-the-... For instance run Theia repo itself: https://gitpod.io/#https://github.com/eclipse-theia/theia