Bootstrap documentation for Piper-NG CLI/GH Action (#1448)

documentation/docs/cli/index.md

@@ -0,0 +1,14 @@
+# Project "Piper" CLI
+
+The CLI is built using the go programming language and thus is distributed in a single binary file for Linux.
+
+The latest released version can be downloaded via `wget https://github.com/SAP/jenkins-library/releases/latest/download/piper`.
+
+Specific versions an be downloaded from the [GitHub releases](https://github.com/SAP/jenkins-library/releases) page.
+
+Once available in `$PATH`, it is ready to use.
+
+To verify the version you got, run `piper version`.
+To read the online help, run `piper help`.
+
+If you're interested in using it with GitHub Actions, see [the Project "Piper" Action](https://github.com/SAP/project-piper-action) which makes the tool more convinient to use.

documentation/docs/index.md

@@ -13,6 +13,8 @@ To get you started quickly, project "Piper" offers you the following artifacts:
     * [General Purpose Pipeline](stages/introduction/)
     * [SAP Cloud SDK Pipeline][cloud-sdk-pipeline]
 * [A shared library][piper-library] that contains reusable step implementations, which enable you to customize our preconfigured pipelines, or to even build your own customized ones
+* A standalone [command line utility](cli) for Linux and a [GitHub Action](https://github.com/SAP/project-piper-action)
+    * Note: This version is still in early development. Feel free to use it and [provide feedback](https://github.com/SAP/jenkins-library/issues), but don't expect all the features of the Jenkins library
 * A set of [Docker images][devops-docker-images] to setup a CI/CD environment in minutes using sophisticated life-cycle management
 
 To find out which offering is right for you, we recommend to look at the ready-made pipelines first.

documentation/mkdocs.yml

@@ -97,6 +97,7 @@ nav:
         - xsDeploy: steps/xsDeploy.md
     - 'Library Steps (deprecated)':
         - artifactSetVersion: steps/artifactSetVersion.md
+    - 'Command line tool': cli/index.md
     - Resources:
         - 'Custom Jenkins Setup': customjenkins.md