Need clarification in the preface.adoc

[hantsy]

I have just read preface.

And some points I found need more clarification.

The GlassFish Samples project is a collection of sample applications that demonstrate a broad range of Jakarta EE technologies. The (Java EE 8) GlassFish Samples are available from the GlassFish Samples project page at https://javaee.github.io/glassfish-samples/.

The Glassfish Sample will be merged with Jakarta EE 8 samples? or provided as a standalone project, and the URL needs an update.
And it is the sample codes of this doc?

In the Default Paths and File Names section.

as-install-parent/docs/jakartaee-tutorial

Does this mean this tutorial will be included in the Glassfish dist?

GlassFish Server or the SDK

Sun and oracle provided a Java EE SDK for developers, which packaged the Glassfish server, tutorial, first cup tutorial, and sample codes in one archive. If there is no SDK for the new Glassfish, I think should remove "or the SDK" text.

[hantsy]

Avoid some duplicate work, I think the pr from @gabrielbussolo is useful to category the preface modification.