(CAT-1345) Update gem README.md

README.md

@@ -1,18 +1,55 @@
 # Puppet::Modulebuilder
 
+## Table of Contents
+
+1. [Overview - What is Puppet::Modulebuilder?](#overview)
+2. [Description - What does the gem do?](#description)
+3. [Usage - How can the gem be used?](#usage)
+4. [Testing - How to test changes to the gem?](#contributing)
+5. [Contributing - How to contribute to the gem?](#contributing)
+6. [Development - How to release changes to the gem?](#development)
+
+## Overview
+
 The `puppet-modulebuilder` gem contains the reference implementation for building Puppet modules from source.
 
+## Description
+
+The purpose of this tool is to take a given local module directory and compile it into a `.tar` file, known as the `tarball`, that can then be installed directly by Puppet on a target machine or uploaded onto the [Puppet Forge](https://forge.puppet.com/) so that it can be accessed publicly.
+
+As part of this process any non-deliverable aspects of the module, parts of it related to the modules development or testing for example, are stripped away leaving only the documentation and the puppet/ruby code that is needed for the module to function.
+
 ## Usage
 
+This gem can be used in one of two ways, the first being to call on it directly as shown in the example below:
+
 ```ruby
 builder = Puppet::Modulebuilder::Builder.new('./puppetlabs-motd', './pkg', nil)
 builder.build
 ```
 
-## Development
+For conveniances sake the `puppet-modulebuilder` gem has been included within the `PDK` and as such can be called on to run against a module from within it using the build command as shown below:
+
+```ruby
+pdk build
+```
+
+### Testing
 
-To release a new version, update the version number in `version.rb`, run `bundle exec rake changelog` and create a mergeback PR with the results. If that passes, run `bundle exec rake 'release[upstream]'`, which will create a git tag for the version, push git commits and tags, and push the `.gem` file to [rubygems.org](https://rubygems.org).
+Acceptance tests for this module leverage [puppet_litmus](https://github.com/puppetlabs/puppet_litmus)
+
+```bash
+bundle exec rake 'litmus:provision[docker, litmusimage/ubuntu:22.04]'
+bundle exec rake 'litmus:install_agent[puppet8-nightly]'
+bundle exec rake 'litmus:install_module'
+```
 
 ## Contributing
 
 Bug reports and pull requests are welcome on GitHub at https://github.com/puppetlabs/puppet-modulebuilder.
+
+## Development
+
+To release a new version, simply run the `Release Prep` github action workflow, passing it the desired version, in order to generate a PR containing the necesary changes.
+
+Once this PR is merged you can then run the `Release` action in order to build the gem and push it to [rubygems.org](https://rubygems.org).