[gnome-builder] CONTRIBUTING.md: update issue tracking information

[Christian Hergert <chergert src gnome org>]

commit caa00b65eda98ebe4db1df675f47b2538477b94f
Author: Christian Hergert <chergert redhat com>
Date:   Tue Sep 6 15:43:22 2022 -0700

    CONTRIBUTING.md: update issue tracking information

 CONTRIBUTING.md | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)
---
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index d250b3053..4a086fd3a 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -11,8 +11,17 @@ that do this for fun. Be respectful and assume the best of each other.
 
 ## Filing a bug
 
-Please file bugs for issues, enhancements and features on
-[our bug tracker](https://gitlab.gnome.org/GNOME/gnome-builder/issues).
+Please file issues for bugs on our
+[our issue tracker](https://gitlab.gnome.org/GNOME/gnome-builder/issues)
+after you have tested a Nightly release to verify the bug has not already
+been fixed.
+
+You can install Nightly from Flatpak using `flatpak --user install gnome-nightly org.gnome.TextEditor.Devel`.
+
+__Please do not file issues for feature requests.__
+Features must go through the design process first.
+File an issue at [Teams/Design/Whiteboards](https://gitlab.gnome.org/Teams/Design/whiteboards/) to begin 
that process.
+In the end you should have a mockup, implementation specification, and breakdown of how that will change the 
existing code-base.
 
 Create a
 [Merge Request](https://gitlab.gnome.org/GNOME/gnome-builder/merge_requests)