Make INSTALL-cloud agree with discourse-setup (#8102)

Make INSTALL-cloud agree with discourse-setup (#8102)

discourse-setup will install Docker. Several people lately have had trouble with a | getting turned into a > when trying to curl the site into sh.

Also, the recommended git clone command will create /var/discourse, so don’t tell people to make that directory, as that too can be confusing.

diff --git a/docs/INSTALL-cloud.md b/docs/INSTALL-cloud.md
index f7fb134..ede6f1f 100644
--- a/docs/INSTALL-cloud.md
+++ b/docs/INSTALL-cloud.md
@@ -26,15 +26,13 @@ Enter the root password from the email DigitalOcean sent you when the server was
 
 <img src="https://www.discourse.org/images/install/15/ssh-login-terminal.png" width="600px">
 
-### Install Docker / Git
+### Install Docker / Git (Optional)
 
-    wget -qO- https://get.docker.com/ | sh
-
-This command installs the latest versions of Docker and Git on your server. Alternately, you can manually [install Git](https://git-scm.com/book/en/v2/Getting-Started-Installing-Git) and the [Docker package for your OS](https://docs.docker.com/installation/).
+If you have reason to install your own version of Docker, you may do so. If docker is not installed, `discourse-setup` will automatically install it from get.docker.com.
 
 ### Install Discourse
 
-Create a `/var/discourse` folder, clone the [Official Discourse Docker Image][dd] into it:
+Clone the [Official Discourse Docker Image][dd] into `/var/discourse`.
 
     sudo -s
     git clone https://github.com/discourse/discourse_docker.git /var/discourse

GitHub sha: 215f6d97