Dockerfile comments

Dockerfile

@@ -34,7 +34,7 @@ RUN apt-get update -y && apt-get upgrade -y && \
     ssh-client \
     && rm -rf /var/lib/apt/lists/* \
     && busybox --install \
-## clean the apt's cache to reduce the image size
+## clean the apt's cache 
     && apt-get clean \
     && rm -rf /var/cache/apt \
 ## create download repository