Before we look at the various plugins and ways to extend Docker, we should look at what a typical life cycle of a container looks like.
Using the example from the previous section, let's launch the official PHP 5.6 container and then replace it with the official PHP 7.0 one.
Before we can launch our containers, we need to get Docker up and running; luckily, this is a simple process.
In the following chapter, we will be getting into bootstrapping our Docker environments using Docker Machine; however, for now, let's perform a quick installation of Docker on a cloud server.
The following instructions will work on Ubuntu 14.04 LTS or CentOS 7 instances hosted on any of the public clouds, such as the following: ...