Add NGINX Unit documentation

Author: alessfg

README.md

@@ -4,7 +4,7 @@ Ansible NGINX Role
 [![Ansible Galaxy](https://img.shields.io/badge/galaxy-nginxinc.nginx-5bbdbf.svg)](https://galaxy.ansible.com/nginxinc/nginx)
 [![Build Status](https://travis-ci.org/nginxinc/ansible-role-nginx.svg?branch=master)](https://travis-ci.org/nginxinc/ansible-role-nginx)
 
-This role installs open source NGINX or NGINX Plus on your target host.
+This role installs open source NGINX, NGINX Plus, or NGINX Unit on your target host.
 
 Requirements
 ------------
@@ -40,35 +40,57 @@ It supports all platforms supported by [open source NGINX](https://nginx.org/en/
 
 **NGINX Plus:**
 
-    CentOS:
-      versions:
-        - 6
-        - 7
-    RedHat:
-      versions:
-        - 6
-        - 7
     Debian:
       versions:
-        - wheezy
         - jessie
         - stretch
     Ubuntu:
       versions:
         - trusty
         - xenial
         - zesty
+        - artful
+    CentOS:
+      versions:
+        - 6.5
+        - 7
+    RedHat:
+      versions:
+        - 6.5
+        - 7
+    Oracle Linux:
+      versions:
+        - 6.5
+        - 7
+    Amazon Linux:
+      versions:
+        - 2016.09
     SUSE/SLES:
       versions:
         - 12
     FreeBSD:
       versions:
         - 10.3
         - 11
-    Oracle Linux:
+
+**NGINX Unit:**
+
+    CentOS:
       versions:
-        - 6.5
+        - 6
         - 7
+    RedHat:
+      versions:
+        - 6
+        - 7
+    Debian:
+      versions:
+        - jessie
+        - stretch
+    Ubuntu:
+      versions:
+        - xenial
+        - artful
     Amazon Linux:
       versions:
         - 2016.09
@@ -89,6 +111,11 @@ This role has multiple variables. The defaults for all these variables are the f
     # Default is mainline.
     branch: mainline
 
+    # Install NGINX Unit and NGINX Unit packages.
+    # Default is false.
+    unit_enable: false
+    unit_packages: false
+
     # Install nginscript, perl, waf (NGINX Plus only), geoip, image-filter, rtmp and/or xslt modules.
     # Default is false.
     modules:
@@ -184,6 +211,17 @@ This is a sample playbook file for deploying the Ansible Galaxy NGINX role to a
       roles:
         - role: nginxinc.nginx
 
+This is a sample playbook file for deploying the Ansible Galaxy NGINX role in a localhost to install NGINX Unit and all NGINX Unit language packages.
+
+    ---
+    - hosts: localhost
+      become: true
+      roles:
+        - role: nginxinc.nginx
+      vars:
+        - unit_enable: true
+        - unit_packages: true
+
 To run any of the above sample playbooks create a `setup-nginx.yml` file and paste the contents. Executing the Ansible Playbook is then as simple as executing `ansible-playbook setup-nginx.yml`.
 
 Alternatively, you can also clone this repository instead of installing it from Ansible Galaxy. If you decide to do so, replace the role variable in the previous sample playbooks from `nginxinc.nginx` to `ansible-role-nginx`.