Adapt gitignore to allow shipping of static files in apps

After this commit, only the top level static files folder is ignored, while apps may contain static files that can then be collected by django

.gitignore

@@ -5,7 +5,7 @@
 AKPlanning/settings_secrets.py
 
 # static files generated by django
-static/
+/static/
 
 # Created by https://www.gitignore.io/api/python,django,virtualenv,pycharm+all
 # Edit at https://www.gitignore.io/?templates=python,django,virtualenv,pycharm+all