review documentation

- clear separation of README.md from
  https://sap.github.io/jenkins-library/
- enhanced https://sap.github.io/jenkins-library/home
- introduction of guided tour

documentation/docs/samples/cloud-cf-helloworld-nodejs/.pipeline/config.yml

@@ -0,0 +1,11 @@
+general:
+steps:
+  mtaBuild:
+    buildTarget: 'CF'
+  cloudFoundryDeploy:
+    deployTool: 'mtaDeployPlugin'
+    deployType: 'standard'
+    cloudFoundry:
+      org: '<your-organisation>'
+      space: '<your-space>'
+      credentialsId: 'CF_CREDENTIALSID'

documentation/docs/samples/cloud-cf-helloworld-nodejs/Jenkinsfile

@@ -0,0 +1,21 @@
+@Library('piper-lib-os') _
+
+node() {
+
+  stage('prepare') {
+
+    checkout scm
+
+    setupCommonPipelineEnvironment script:this
+  }
+
+  stage('build') {
+    mtaBuild script: this
+  }
+  
+  stage('deploy') {
+    def mtarFilePath = commonPipelineEnvironment.getMtarFilePath()
+
+    cloudFoundryDeploy( script: this, mtaPath: mtarFilePath)
+  }
+}

documentation/docs/samples/cloud-cf-helloworld-nodejs/mta.yaml

@@ -0,0 +1,10 @@
+_schema-version: 2.1.0
+ID: com.sap.piper.node.hello.world
+version: 1.0.0
+description: A Hello World sample application
+provider: SAP Sample generator
+
+modules:
+  - name: piper.node.hello.world
+    type: nodejs
+    path: .