Subject email reset (#17)

* add Reset Password email subject

* correct url of  reset password mail

Co-authored-by: Prudhommeaux Jérémy <jeremy.prudhommeaux@student-cs.fr>

templates/email-reset-template.txt

@@ -4,7 +4,7 @@ réinitialiser le mot de passe de votre compte OSER.{% endblocktrans %}
 
 {% trans "Please go to the following page and choose a new password:" %}
 {% block reset_link %}
-http://localhost:4200{% url 'password_reset_confirm' uidb64=uid token=token %}
+https://www.oser-cs.fr/{% url 'password_reset_confirm' uidb64=uid token=token %}
 {% endblock %}
 {% trans "Your username, in case you've forgotten:" %} {{ user.get_username }}