diff --git a/Dockerfile.synchronizer b/Dockerfile.synchronizer
index 3b248cc..6e6c25e 100644
--- a/Dockerfile.synchronizer
+++ b/Dockerfile.synchronizer
@@ -13,6 +13,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# docker build -t xosproject/rcord-synchronizer:candidate -f Dockerfile.synchronizer .
 
 # xosproject/rcord-synchronizer
 FROM xosproject/xos-synchronizer-base:candidate