update readme

.gitignore

@@ -1,12 +1,17 @@
+# build output
 **/bin
 **/obj
 **/libs
+
+# editors
 **/*.xproj
 **/*.xproj.user
 **/.vs
 **/.vscode
 **/*.error
 **/*.json.pretty
+
+# output
 node_modules
 _downloads
 _layout

README.md

@@ -8,11 +8,19 @@
 
 ## Get Started
 
-![win](docs/res/win_sm.png) [Pre-reqs](docs/start/envwin.md) | [Download](https://github.com/actions/runner/releases/latest)  
+The runner is the application that runs a job from a GitHub Actions workflow.  The runner can run on the [hosted machine pools](https://github.com/actions/virtual-environments) or run on self-hosted virtual machines.
 
-![macOS](docs/res/apple_sm.png)  [Pre-reqs](docs/start/envosx.md) | [Download](https://github.com/actions/runner/releases/latest)  
+Read more about self-hosted runners [here](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/about-self-hosted-runners).
 
-![linux](docs/res/linux_sm.png)  [Pre-reqs](docs/start/envlinux.md) | [Download](https://github.com/actions/runner/releases/latest)
+For more information about installing and using self-hosted runners, see [Adding self-hosted runners](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/adding-self-hosted-runners) and [Using self-hosted runners in a workflow](https://help.github.com/en/actions/automating-your-workflow-with-github-actions/using-self-hosted-runners-in-a-workflow)
+
+Runner releases:
+
+![win](docs/res/win_sm.png) [Pre-reqs](docs/start/envwin.md) | [Download](https://github.com/actions/runner/releases)  
+
+![macOS](docs/res/apple_sm.png)  [Pre-reqs](docs/start/envosx.md) | [Download](https://github.com/actions/runner/releases)  
+
+![linux](docs/res/linux_sm.png)  [Pre-reqs](docs/start/envlinux.md) | [Download](https://github.com/actions/runner/releases)
 
 **Configure:**