[jhbuild/readme_some_info] README: info for non-developers and for system wide JHBuild

[Nelson Ben <nbenitez src gnome org>]

commit 841d58ce46aebec10c160a8acf92b405e951d161
Author: Nelson Benítez León <nbenitezl gmail com>
Date:   Sun Jan 30 22:38:17 2022 -0400

    README: info for non-developers and for system wide JHBuild
    
    taken from ebassi's post:
    https://gitlab.gnome.org/GNOME/jhbuild/-/issues/77#note_1031060

 README.rst | 6 ++++++
 1 file changed, 6 insertions(+)
---
diff --git a/README.rst b/README.rst
index ebfa5012..d17c0031 100644
--- a/README.rst
+++ b/README.rst
@@ -9,6 +9,10 @@ extended to be usable with other projects.
 
 JHBuild requires Python >= 3.5
 
+Non-developers that wish to test GNOME can use the GNOME OS nightly VM images: https://os.gnome.org
+
+Developers tend to either use JHBuild for their modules, or follow workflows like this_ to set up a whole 
session, in case they are working on the compositor.
+
 Installing JHBuild
 ------------------
 
@@ -157,3 +161,5 @@ implementations :), please file them at:
   https://gitlab.gnome.org/GNOME/jhbuild/issues/new
 
 This will ensure your request is not lost.
+
+.. _this: https://blogs.gnome.org/fmuellner/2020/03/02/shell-hacking-on-silverblue/