I just built a brand new project, and when I run npm run build I get the error below.
Please feel free to close this if it's not the appropriate place to report- maybe it's caused by one of my packages?
npm WARN invalid config loglevel="notice"
npm: 5.6.0
vue-cli: 2.9.1

Google says that "This bug seems to be caused by installing a dependency that depends on an old version of NPM". (source).
Running npm config set loglevel warn might solve the issue, which I think is not related to vue-cli or this template.
Hope it helps!
This does not affect running or build, and it's likely not related to template itself, so closing this for now.
Most helpful comment
Google says that "This bug seems to be caused by installing a dependency that depends on an old version of NPM". (source).
Running
npm config set loglevel warnmight solve the issue, which I think is not related to vue-cli or this template.Hope it helps!