config: redirect to /admin/ after login (default was /accounts/profile/)

Django's default LOGIN_REDIRECT_URL is /accounts/profile/, which VMC
doesn't route — a successful admin login landed on a 404. Point both
LOGIN_REDIRECT_URL and LOGOUT_REDIRECT_URL at the admin.

Author: mwalkowski

src/vmc/config/settings.py

@@ -73,6 +73,9 @@ def get_config(key, default):
     [F"{SCHEMA}://{DOMAIN}{PORT}", "http://localhost:8080", "http://localhost"],
 )
 
+LOGIN_REDIRECT_URL = '/admin/'
+LOGOUT_REDIRECT_URL = '/admin/login/'
+
 
 INTERNAL_APPS = [
     'vmc.common',