Refactor for support multiple ansible reversion

I will only build this image with alpine linux if you need other os
resource, maybe you can see other repo.

1. https://hub.docker.com/r/chusiang/ansible-jupyter/
2. https://hub.docker.com/r/williamyeh/ansible/

Author: chusiang

README.md

@@ -1,18 +1,14 @@
 # Docker image: Ansible
 
-[![Docker Hub](https://img.shields.io/badge/docker-ansible-blue.svg)](https://hub.docker.com/r/chusiang/ansible/)
+[![Docker Hub](https://img.shields.io/badge/docker-ansible-blue.svg)](https://hub.docker.com/r/chusiang/ansible/) [![Docker Hub](https://img.shields.io/badge/os-alpine-blue.svg)](https://hub.docker.com/_/alpine/)
 
-A Docker image for run the [Ansible][ansible_official] v2.3.1.
+A Docker image for run the [Ansible][ansible_official] Engine on Alpine Linux.
 
 [ansible_official]:  https://www.ansible.com/
 
 ## Supported tags and respective `Dockerfile` links
 
-- `alpine-3.6`, `latest` [*(Dockerfile)*][dockerfile_alpine-3.6]
-
-[dockerfile_alpine-3.6]: alpine-3.6/Dockerfile
-
-
+- `2.3`, `latest` [*(Dockerfile)*](v2.3/Dockerfile)
 
 ## Build image
 
@@ -25,14 +21,14 @@ A Docker image for run the [Ansible][ansible_official] v2.3.1.
 1. Go to workspace.
 
     ```
-    $ cd ansible.dockerfile/alpine-3.6
+    $ cd ansible.dockerfile/<REVERSION>
     ```
 
 1. Bunild the image.
 
     ```
     $ docker build -t ansible .
-    $ docker build -t ansible:alpine-3.6 .
+    $ docker build -t ansible:<REVERSION> .
     ```
 
 ## Run container
@@ -65,7 +61,7 @@ Enjoy it !
 
 ## License
 
-MIT license from 2017.
+MIT license from 2017-2018.
 
 ## Author Information
 

alpine-3.6/Dockerfile renamed to v2.3/Dockerfile

@@ -13,13 +13,13 @@ RUN apk add --no-cache build-base python py-pip python-dev \
 RUN pip install -U pip cffi
 
 # Setup the ansible.
-RUN pip install ansible
+RUN pip install 'ansible>=2.3.0,<2.4.0'
 
 # for disable localhost warning message.
 RUN mkdir /etc/ansible && \
       /bin/echo -e "[local]\nlocalhost ansible_connection=local" > /etc/ansible/hosts
 
-RUN echo "===> Install some package for Latticework Inc...."  && \
+RUN echo "===> Install some package ..."  && \
       apk add --update --no-cache \
       bash \
       bash-completion \
@@ -30,11 +30,12 @@ RUN echo "===> Install some package for Latticework Inc...."  && \
       sshpass \
       vim
 
-RUN echo "===> Removing package cache..."  && \
-      apk del build-dependencies             ;\
-      rm -rf /var/cache/apk/*
+RUN echo "===> Removing package cache ..."  && \
+      apk del build-dependencies             ; \
+      rm -rf /var/cache/apk/*               && \
+      rm -rf ~/.cache/pip
 
-ONBUILD  RUN echo "===> Updating TLS certificates..."  && \
+ONBUILD  RUN echo "===> Updating TLS certificates ..."  && \
       apk add --update openssl ca-certificates
 
 WORKDIR /srv