fix continuation lines

Dockerfile

@@ -12,37 +12,33 @@ ENV PS1="$(whoami)@$(hostname):$(pwd)$ " \
 HOME="/root" \
 TERM="xterm"
 
-# install packages
 RUN \
- apk add --no-cache --virtual=build-dependencies \
+ echo "**** install build packages ****" && \
+  apk add --no-cache --virtual=build-dependencies \
 	curl \
 	tar && \
+ echo "**** install runtime packages ****" && \
  apk add --no-cache \
 	bash \
 	ca-certificates \
 	coreutils \
 	shadow \
 	tzdata && \
-
-# add s6 overlay
+ echo "**** add s6 overlay ****" && \
  curl -o \
  /tmp/s6-overlay.tar.gz -L \
 	"https://github.com/just-containers/s6-overlay/releases/download/${OVERLAY_VERSION}/s6-overlay-${OVERLAY_ARCH}.tar.gz" && \
  tar xfz \
 	/tmp/s6-overlay.tar.gz -C / && \
-
-# create abc user
+ echo "**** create abc user and make our folders ****" && \
  groupmod -g 1000 users && \
  useradd -u 911 -U -d /config -s /bin/false abc && \
  usermod -G users abc && \
-
-# make our folders
  mkdir -p \
 	/app \
 	/config \
 	/defaults && \
-
-# clean up
+ echo "**** cleanup ****" && \
  apk del --purge \
 	build-dependencies && \
  rm -rf \