小知识：更换主题，eg：grappelli
    1.pip install grappelli -i https://pypi.douban.com/simple/
    2.

    1. INSTALLED_APPS = [
    2.     'grappelli',
    3. ]

    3.

    1. urlpatterns = [
    2.     re_path(r"^", include('jobs.urls')),
    3.     # 在这里加上路径
    4.     path('grappelli/',include('grappelli.urls')),
    5.     path('admin/', admin.site.urls),
    7. ]