[App] Optimize the size of vue app

[milanbargiel]

During the build process of the Vue app, a warning is displayed.

Todos

• Check if we can reduce the file size of the app
• Reduce file size if possible to improve loading times and bandwidth usage

Tip

• This tool shows the file size of bundles: https://bundlephobia.com

[milanbargiel]

Maybe file size can be improved by rendering HTML server-side in a static manner like nuxt.js does @moritzpflueger?