Add docker target to provision.sh

provision.sh

@@ -20,28 +20,26 @@ if [ -z "$1" ]; then
 else
     case $1 in
         os)
-            $BASE_CMD --tags os
-        ;;
+            $BASE_CMD --tags os ;;
+        docker)
+            $BASE_CMD --tags docker ;;
         services)
             if [ -z "$2" ]; then
                 $BASE_CMD --tags services
             else
                 $BASE_CMD --tags services --extra-vars "single_service=$2"
             fi
-        ;;
+            ;;
         reboot)
             if [ "$2" = "-f" ] || [ "$2" = "--force" ]; then
                 $BASE_CMD --tags reboot --extra-vars "force_reboot=true"
             else
                 $BASE_CMD --tags reboot
             fi
-        ;;
+            ;;
         -h|--help)
-            usage
-        ;;
+            usage ;;
         *)
-            usage >&2
-            exit 1
-        ;;
+            usage >&2; exit 1 ;;
     esac
 fi