Add Action Debugging information (#46)

* Add Action Debugging information

* Small verbiage updates

* Update README.md

* minor grammar updates

docs/action-debugging.md

@@ -0,0 +1,26 @@
+# Debugging
+If the build logs do not provide enough detail on why a build may be failing, some other options exist to assist with troubleshooting.
+
+## Runner Diagnostic Logs
+Runner Diagnostic Logs provide additional log files detailing how the Runner is executing an action.
+
+Each file contains different logging information that corresponds to that process:
+  * The Runner process coordinates setting up workers to execute jobs.
+  * The Worker process executes the job.
+
+These files contain the prefix `Runner_` or `Worker_` to indicate the log source.
+
+### How to Access Runner Diagnostic Logs
+These log files are enabled by [setting the secret](https://help.github.com/en/articles/virtual-environments-for-github-actions#creating-and-using-secrets-encrypted-variables) `ACTIONS_RUNNER_DEBUG` to `true`. 
+
+All actions ran while this secret is enabled contain additional diagnostic log files in the `runner-diagnostic-logs` folder of the [log archive](https://help.github.com/en/articles/managing-a-workflow-run#downloading-logs-and-artifacts).
+
+## Step Debug Logs
+Step debug logs increase the verbosity of a job's logs during and after a job's execution to assist with troubleshooting. 
+
+Additional log events with the prefix `##[debug]` will now also appear in the job's logs.
+
+### How to Access Step Debug Logs
+This flag can be enabled by [setting the secret](https://help.github.com/en/articles/virtual-environments-for-github-actions#creating-and-using-secrets-encrypted-variables) `ACTIONS_STEP_DEBUG` to `true`.
+
+All actions ran while this secret is enabled will show debug events in the [Downloaded Logs](https://help.github.com/en/articles/managing-a-workflow-run#downloading-logs-and-artifacts) and [Web Logs](https://help.github.com/en/articles/managing-a-workflow-run#viewing-logs-to-diagnose-failures).

packages/core/README.md

@@ -60,7 +60,7 @@ catch (err) {
 
 #### Logging
 
-Finally, this library provides some utilities for logging. Note that debug logging is hidden from the logs by default. This behavior can be toggled by [setting a secret](https://developer.github.com/actions/managing-workflows/storing-secrets/): `ACTIONS_STEPS_DEBUG = true`.:
+Finally, this library provides some utilities for logging. Note that debug logging is hidden from the logs by default. This behavior can be toggled by enabling the [Step Debug Logs](../../docs/action-debugging.md#step-debug-logs).
 
 ```
 const core = require('@actions/core');