feat(email): add {email} placeholder to user invitation email (#564)

* feat(email): add {email} placeholder to user invitation email

* change default values and setting description

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Co-authored-by: Elias Schneider <login@eliasschneider.com>

backend/src/email/email.service.ts

@@ -116,7 +116,8 @@ export class EmailService {
       this.config
         .get("email.inviteMessage")
         .replaceAll("{url}", loginUrl)
-        .replaceAll("{password}", password),
+        .replaceAll("{password}", password)
+        .replaceAll("{email}", recipientEmail),
     );
   }