Limit session cookies to specific URL prefix
This fixes an issue where the session cookies are shared between instances when running multiple instances of the app under different URL prefixes.
Setting APPLICATION_ROOT (or SESSION_COOKIE_PATH) should limit the session cookies to the configured URL prefix.
See https://flask.palletsprojects.com/en/3.0.x/config/#APPLICATION_ROOT.
Signed-off-by: Andre Moreira Magalhaes andre.magalhaes@collabora.com