Exporting SYNO_LOCAL_HOSTNAME=1 only works on the first deploy invocation. Subsequent deploys using the saved config fails because it saves $SYNO_HOSTNAME instead of $SYNO_LOCAL_HOSTNAME.
_err "SYNO_USE_TEMP_ADMIN=1 only support local deployment, though if you are sure that the hostname $SYNO_HOSTNAME is targeting to your **current local machine**, execute 'export SYNO_LOCAL_HOSTNAME=1' then rerun."
_err "SYNO_USE_TEMP_ADMIN=1 only support local deployment, though if you are sure that the hostname $SYNO_HOSTNAME is targeting to your **current local machine**, execute 'export SYNO_LOCAL_HOSTNAME=1' then rerun."