以下Dockerfile为何build不了？问题出在哪里？

Question

FROM ubuntu
LABEL Description="test" Vender="test" Version="1.0"
RUN apt-get update && apt-get install -y git gcc g++ tmux apt-utils mysql-client mysql-server

docker build -t test/test .

卡在下面这里了，等多久没没用，为何会这样呢？
上面Dockerfile问题出在哪里呢？

Selecting previously unselected package psmisc.
Preparing to unpack .../psmisc_22.21-2.1build1_amd64.deb ...
Unpacking psmisc (22.21-2.1build1) ...
Processing triggers for systemd (229-4ubuntu6) ...
Processing triggers for libc-bin (2.23-0ubuntu3) ...
Setting up mysql-common (5.7.16-0ubuntu0.16.04.1) ...
update-alternatives: using /etc/mysql/my.cnf.fallback to provide /etc/mysql/my.cnf (my.cnf) in auto mode
Selecting previously unselected package mysql-server-5.7.
(Reading database ... 10999 files and directories currently installed.)
Preparing to unpack .../mysql-server-5.7_5.7.16-0ubuntu0.16.04.1_amd64.deb ...
debconf: unable to initialize frontend: Dialog
debconf: (TERM is not set, so the dialog frontend is not usable.)
debconf: falling back to frontend: Readline
Configuring mysql-server-5.7
----------------------------

While not mandatory, it is highly recommended that you set a password for the
MySQL administrative "root" user.

If this field is left blank, the password will not be changed.

New password for the MySQL "root" user: 

Answer 1

This requires interaction. It has been waiting for the password to be entered, so it is stuck.
You can refer to this article: http://blog.csdn.net/fickyou/...

Answer 2

You can no longer interact while building. . If you need mysql, you can directly download the mysql image. If you still need to add something, you can first open a container with -it, then install it, exit the container, commit the container, and then make the image