:hammer: add attachments bucket name env

deploy/roles/mint-v2/templates/v2/env.j2

@@ -79,3 +79,4 @@ RABBITMQ_USER="{{ app_rabbitmq_user }}"
 RABBITMQ_PASSWORD="{{ app_rabbitmq_password }}"
 
 CDN_URLS={{ app_cdn_urls }}
+ATTACHMENTS_BUCKET_NAME={{ app_attachments_bucket_name }}