[FeatureRequest] Upgrade the live demo to version v3.0

[yjqg6666]

Which module is your feature request related to? demo

Is your feature request related to a problem? The current live demo is using an old version v2.5.3 (the version info is found at installation page ) instead of the recent major release v3.0.0.

Describe the solution you'd like The recent major release version v3.0.0 which has many improvements could be deployed at the demo site. The error analysis feature is a big part of it.