add steps

main.sh

@@ -453,7 +453,7 @@ gen_image() {
         if [ -e "$df" ];then dockerfiles="$dockerfiles $df" && break;fi
     done
     local parts=""
-    for partsstep in squashpre from args argspost helpers pre base post postextra clean cleanpost squash extra labels labelspost;do
+    for partsstep in squashpre from args argspost helpers pre base post postextra clean cleanpost predosquash squash postdosquash extra labels labelspost;do
         parts="$parts pre_${partsstep} ${partsstep} post_${partsstep}"
     done
     parts=$(echo "$parts"|xargs)