Update README.md

Author: mpkelly

Diff for: README.md

@@ -1,2 +1,10 @@
 # githubdeployments-phpunit-phpcs-example
-An example plugin repository with a workflow script that runs PHP CodeSniffer and PHPUnit 
+An example plugin repository with a workflow script that runs PHP CodeSniffer and PHPUnit. 
+
+The [workflow](.github/workflows/wpcom.yml) does the following:
+
+- Checkout the repository
+- Runs the composer action which executes the default command, `composter install`.
+- Runs the composer action again with a custom command that runs PHPCodeSniffer
+- Runs the composer action again with a custom command that runs PHPUnit
+- If all previous actions completely withotu error, it creates a build artifact with name "wpcom" which is required for WordPress.com's GitHub Deployment feature