Update playbooks and README

README.md

 # linux-self-service
 A compilation of self-service ansible-playbooks used to automate the configuration of Linux@EMBL-EBI devices.
+
+# What do these playbooks do?
+These playbooks are designed to help users configure apps and services which may not be standard for all EMBL-EBI users.
+
+Each playbook configures something different. The filenames are loosely descriptive of the intended purpose but, for more detailed descriptions, you can read the playbook comments.
+
+```
+cat ./playbooks/eduroam.yaml
+```
+
+# How do I run these self-service tasks?
+Choose the playbook you want to run, then use the `ansible-playbook` command to execute it as shown below.
+
+**(NOTE)** *You can use either a relative, or absolute path to the playbook YAML file*
+
+```
+# ansible-playbook <PLAYBOOK_PATH> --connection=local
+ansible-playbook ./playbooks/eduroam.yaml --connection=local
+```
+
+Some playbooks require root priveleges to execute successfully. In these cases, you'll be prompted to use `sudo`. Simply prefix your command with sudo.

playbooks/docker.yaml

 ---
+# This playbook configures the official Docker apt repository and installs all Docker Engine components
 - name: Install and Configure Docker Engine
   hosts: localhost
   vars:

playbooks/eduroam.yaml

 ---
+# This playbook adds the eduroam Wi-Fi network via NetworkManager cli
+# Once added, the connection will appear in your known Wi-Fi networks list.
+# Your eduroam password must be entered manually when connecting for the first time.
 - name: Install Eduroam Wi-Fi
   hosts: localhost
   tasks:

playbooks/network_reset.yaml

 ---
+# This playbook restarts various network services in an attempt to fix connectivity issues.
 - name: Reset Network Services
   hosts: localhost
   tasks: