- getSeason() only for staff members

- new view staff()
- updated bootstrap to version 3.4.1
- updated jquery to 3.6.3
- changed container layout in main view 'matchday'

tipp/urls.py

@@ -22,6 +22,7 @@ urlpatterns = [
     re_path(r'^blog/newpost$', views.newBlogpost),
     re_path(r'^blog/(?P<page>\d)$', views.blogindex),
     re_path(r'^about$', views.about),
+    re_path(r'^staff', views.staff),
     re_path(r'^accounts/login/', auth_views.LoginView.as_view()),
     re_path(r'^accounts/logout/', auth_views.LogoutView.as_view())
 ]