Fix ShellSpec install process.

Because ShellSpec could not be installed using the installer in the Docker environment,
I changed to the installation method using git clone and Makefile.

Dockerfile

@@ -2,22 +2,20 @@ FROM golang as builder
 ENV ROOT=/go/app
 WORKDIR ${ROOT}
 
-# 1) Install package for setup
-# 2) Install mimixbox
-# 3) Create mimixbox symbolic link in container.
-# 4) Setting root user password
-# 5) Add mimixbox user
-# 6) Setting mimixbox user password
-RUN apt-get update && apt-get install -y expect  && \   
-    go install github.com/nao1215/mimixbox/cmd/mimixbox@latest  && \
+# 1) Install mimixbox
+# 2) Create mimixbox symbolic link in container.
+# 3) Setting root user password
+# 4) Add mimixbox user
+# 5) Setting mimixbox user password
+RUN go install github.com/nao1215/mimixbox/cmd/mimixbox@latest  && \
     mimixbox --full-install /usr/local/bin/
 RUN echo 'root:password' | chpasswd
 RUN useradd mimixbox -m -s /bin/bash &&\
     echo 'mimixbox:password' |chpasswd
 
 # Copy ShellSpec installer
-COPY ./scripts/installShellSpec.sh /home/mimixbox
-RUN  /home/mimixbox/installShellSpec.sh && rm /home/mimixbox/install*.sh
+COPY ./scripts/installShellSpecForDocker.sh .
+RUN  ./installShellSpecForDocker.sh
 
 # If you want to administrator privileges, you become the root user.
 # RUN echo "mimixbox    ALL=(ALL)       ALL" >> /etc/sudoers

README.md

@@ -25,7 +25,7 @@ The table below shows the tools used when developing the commands in the mimixbo
 | pandoc   | Convert markdown files to manpages |
 | make   | Used for build, run, test, etc |
 | gzip   | Used for compress man pages |
-| expect | Used for install ShellSpec in Docker|
+| curl | Used for install ShellSpec |
 | install   | Used for install serial binary and document in the system |
 | docker| Used for testing Mimixbox inside Docker|
 | debootstrap| Used for testing Mimixbox inside jail envrioment|
@@ -34,9 +34,9 @@ The table below shows the tools used when developing the commands in the mimixbo
 If you use Debian-based distribution (e.g. Debian／Ubuntu／Kali Linux／Raspberry Pi OS), You can install tools with the following command.
 
 ```
-$ sudo apt install build-essential wget expect git pandoc gzip expect docker.io debootstrap
+$ sudo apt install build-essential curl git pandoc gzip docker.io debootstrap
 $ go install github.com/google/go-licenses@latest
-$ curl -fsSL https://git.io/shellspec | sh
+$ curl -fsSL https://git.io/shellspec | sh -s -- --yes
 ```
 
 ### How to build

scripts/installShellSpecForDocker.sh

@@ -0,0 +1,5 @@
+#!/bin/bash -eu
+
+git clone https://github.com/shellspec/shellspec.git
+cd shellspec
+make install