Update conf.py

docs/conf.py

@@ -236,7 +236,7 @@
 # Add any extra paths that contain custom files (such as robots.txt or
 # .htaccess) here, relative to this directory. These files are copied
 # directly to the root of the documentation.
-html_extra_path = ['gallery-app_en.html', 'gallery-app_de.html']
+html_extra_path = ['gallery-app_en.html', 'gallery-app_de.html', 'alps_future-app.html']
 
 # If not '', a 'Last updated on:' timestamp is inserted at every page bottom,
 # using the given strftime format.