Sblack4 patch 1 (#2)

* add github action badge to readme

* Update README.md

README.md

@@ -1,19 +1,28 @@
 # Ansible Role: Jetty
-Ansible Role for Jetty 
+![](https://github.com/rhythmictech/ansible-role-jetty/workflows/Molecule%20Test/badge.svg)
+
+Ansible Role to install Jetty 
 
 ## Requirements
 - [geerlingguy.java](https://github.com/geerlingguy/ansible-role-java)
 - [geerlingguy.repo-epel](https://github.com/geerlingguy/ansible-role-repo-epel)
 
 ## Role Variables 
+See the defaults file, [ansible-role-jetty/defaults/main.yml](ansible-role-jetty/defaults/main.yml), f
+or the definitive list. 
+
 There are three defaults that can be altered:
 - `jetty_version: 9.4.9.v20180320`
     - the jetty version - currently this is the only version supported
     - the distribution file is pulled from `files`
-- `jetty_base: /opt`
-    - where to unzip the jetty distribution
-- `jetty_home: /opt/jetty`
-    - symlink to become `JETTY_HOME`
+- `jetty_base: /opt/jetty_base`
+    - put your jetty customizations here
+- `jetty_home: /opt/jetty_home`
+    - the definitive jetty install
+- `jetty_user: jetty`
+    - user who owns and runs jetty
+- `jetty_group: jetty`
+    - group who owns and runs jetty
 
 ## Dependencies 
 - [geerlingguy.java](https://github.com/geerlingguy/ansible-role-java)
@@ -37,6 +46,7 @@ pip install ansible==2.8.1 \
             ansible-lint==4.1.0 \
             molecule==2.20.2 
 ```
+To use the docker scenario you will also need `pip install docker==4.0.2`
 
 To run the complete suite of tests (yamlint, ansible-lint, idempotency, etc) run `molecule test`