add generate manifest example

Author: pcrocker-pivotal

README.md

@@ -1,2 +1,59 @@
 # pipeline-tasks
 Common Concourse Pipeline Tasks
+
+## Examples
+
+All examples use the following resources:
+
+```
+resource_types:
+- name: cf-cli-resource
+  type: docker-image
+  source:
+    repository: patrickcrocker/cf-cli-resource
+    tag: 2.0.0
+
+resources:
+- name: pipeline-tasks
+  type: git
+  source:
+    uri: https://github.com/Pivotal-Field-Engineering/pipeline-tasks.git
+    branch: master
+
+- name: cf-test
+  type: cf-cli-resource
+  source:
+    api: https://api.run.pivotal.io
+    skip_cert_check: false
+    username: [email protected]
+    password: oh-so-secret
+    org: user-org
+    space: test-space
+```
+
+## Generate a Cloud Foundry Manifest
+
+```
+- name: test
+  plan:
+  - aggregate:
+    - get: pipeline-tasks
+    - get: artifact
+  - task: generate-manifest
+    file: pipeline-tasks/generate-manifest/task.yml
+    params:
+      MF_NAME: myapp
+      MF_HOST: myapp
+      MF_SERVICES: [ myapp-db, myapp-mq ]
+      MF_ENV:
+        RAILS_ENV: production
+        RACK_ENV: production
+        JBP_CONFIG_OPEN_JDK_JRE: '{ jre: { version: 1.8.0_+ }, memory_calculator: { stack_threads: 200 } }'
+  - put: cf-push
+    resource: cf-test
+    params:
+      command: zero-downtime-push
+      manifest: task-output/manifest.yml
+      path: artifact/myapp-*.jar
+      current_app_name: {{cf-test-app-name}}
+```