Option d is ambiguous (debug, disabled-login, disabled-password)

[zaoqi]

Ubuntu:

Step 7/9 : RUN adduser -D myuser
 ---> Running in 8083bab9a163
Option d is ambiguous (debug, disabled-login, disabled-password)

Alpinelinux:

/ # adduser --help
BusyBox v1.30.1 (2019-06-12 17:51:55 UTC) multi-call binary.

Usage: adduser [OPTIONS] USER [GROUP]

Create new user, or add USER to GROUP

	-h DIR		Home directory
	-g GECOS	GECOS field
	-s SHELL	Login shell
	-G GRP		Group
	-S		Create a system user
	-D		Don't assign a password
	-H		Don't create home directory
	-u UID		User id
	-k SKEL		Skeleton directory (/etc/skel)

so -D is Don't assign a password

fix #6

[zaoqi]

#6