Global installation script

Docker (and other projects) provides an URL endpoint to download a distribution agnostic installation script : `https://get.docker.com`.

Makes installation procedure super intuitive as it makes possible for anyone to install Docker on any Linux distribution without searching all the steps on the internet.

```
$ curl -Ssl https://get.docker.com | bash
```

I know this kind of `curl | bash` is considered bad practice. However, used with caution, it can make things super easy and save time to many people.

Is it something that has been considered ?

Review the existing installation procedure and the security implications of offering a distribution-agnostic curl-and-bash endpoint. Define the supported Linux distributions, script behavior, hosting location, and safeguards; the work is done when the endpoint is published, documented, and validated across the intended distributions.

Written by the indexing model from the issue text.