(documentation) explain how to customize compiler warnings

[JulioJu]

Hi,

Maybe it could be cool to add in the README.md a short paragraph that explain how to customize compiler warnings / errors.

It's a server side LSP customization, but for newbies it could be very very cool to have this documentation in the README.md of the current project.

Simply say that we should add customization under root_project/.settings/org.eclipse.jdt.core.prefs with values presented at https://help.eclipse.org/neon/topic/org.eclipse.jdt.doc.isv/reference/api/org/eclipse/jdt/core/JavaCore.html ?

Thanks in advance !

[jerrywang1981]

If there is wiki or readme on how to use this, it will help a lot. I want to know:

• How to start
• How to debug

for now, I open terminal and run like

man spring-boot:run

but no idea of how to debug it.

[chemzqm]

PR welcome.

[chemzqm]

Added