feat: Ajout du logo N3wt dans les mails

Back-End/N3wtSchool/mailManager.py

@@ -108,6 +108,7 @@ def sendRegistrationDirector(recipients, establishment_id):
         EMAIL_INSCRIPTION_SUBJECT = '[N3WT-SCHOOL] Bienvenue dans la communauté !'
         context = {
             'BASE_URL': settings.BASE_URL,
+            'URL_DJANGO': settings.URL_DJANGO,
             'email': recipients,
             'establishment': establishment_id
         }