Merge pull request #429 from vjrj/distros-in-readme

Added distros to README and some ansible tip for newbies

Author: djtfmartin

README.md

@@ -6,7 +6,7 @@ This project includes a playbook for setting up an ALA demo.
 
 ### Ansible: The current supported version is: **2.9.7**
 
-The playbooks and roles in this repository have been developed and tested against the above version.
+The playbooks and roles in this repository have been developed and tested against the above version. Typically you need to install ansible in your computer or in the computer you'll use to deploy from.
 
 NOTE: many linux packages have an older version of Ansible (1.7 or even 1.5). You will need to update your packages and upgrade ansible first.
 
@@ -35,6 +35,10 @@ ERROR: apache2_module is not a legal parameter in an Ansible task or handler.
 ```
 then you have an older version of Ansible.
 
+### Operating System
+
+These playbooks and roles are currently well tested on Ubuntu `18.04`. We are testing also Ubuntu `20.04` but it's a work in progress. We have less tested other distributions like Redhat or even Debian as the big majority of our production deployments run over Ubuntu.
+
 ## Setup a Living Atlas
 
 A Living Atlas (LA) can be typically deployed using these [ALA ansible playbooks](https://github.com/AtlasOfLivingAustralia/ala-install/tree/master/ansible) with some custom ansible inventories with information about your LA site (like your domain, organization name, name of the servers to use, contact email, and a big etcetera).