There is a easy way to upgrade your Fedora installation:
https://fedoramagazine.org/fedora-24-feature-graphical-upgra...
https://fedoramagazine.org/fedora-24-feature-graphical-upgra...
(Which is available now, while the GUI will be available at a later time.)
diff --git a/Dockerfile b/Dockerfile
index 7a1d40f..b82e50c 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM fedora:23
+FROM fedora:24
MAINTAINER Gerard Braad <me@gbraad.nl>