Added Helm-deploy job template (#84)

- Updated docs with credentials info

tpl/service/%output_path%/pipelines/review.yml.tt

@@ -110,3 +110,13 @@ jobs:
         trigger: true
       - task: run-tests
         file: <%= @name %>-repository/<%= @output %>/pipelines/tasks/run-tests.yml
+
+  - name: helm-deploy
+    serial: true
+    plan:
+      - get: <%= @name %>-repository
+      - task: helm-deploy
+        file: <%= @name %>-repository/<%= @output %>/pipelines/tasks/helm-deploy.yml
+        params:
+          GOOGLE_APPLICATION_JSON: ((gcr_password))
+          KUBECONFIG_FILE: ((kubeconfig))

tpl/service/%output_path%/pipelines/tasks/helm-deploy.yml.tt

@@ -0,0 +1,22 @@
+---
+platform: linux
+
+image_resource:
+  type: docker-image
+  source:
+    repository: heliostech/kite
+
+inputs:
+  - name: <%= @name %>-repository
+
+run:
+  path: "sh"
+  args:
+    - "-exc"
+    - |
+      helm init --client-only
+      echo ${GOOGLE_APPLICATION_JSON} > gcr_credentials.json
+      export GOOGLE_APPLICATION_CREDENTIALS="${PWD}/gcr_credentials.json"
+      echo ${KUBECONFIG_FILE} | base64 -d > kubeconfig
+      export KUBECONFIG="${PWD}/kubeconfig"
+      helm install <%= @name %>-repository/.kite/charts/<%= @name %>

tpl/service/docs/pipeline.md.tt

@@ -3,6 +3,14 @@
 # About
 __Pipeline__ described in `<%= output_path %>/pipelines/review.yml`
 
+## Credentials overview
+
+  - git_private_key - RSA key with access to your repository
+  - github_token    - [Github token](https://github.com/settings/tokens) with access to web hooks
+  - gcr_password    - JSON containing your [GCP credentials](https://developers.google.com/identity/protocols/application-default-credentials)
+  - slack_webhook   - address of your [Slack Incoming Webhook](https://api.slack.com/incoming-webhooks)
+  - kubeconfig      - your Kubernetes config encoded in base64
+
 ## Configurations overview
 
 A pipeline is configured with __three sections__:
@@ -29,7 +37,7 @@ In `jobs` described actions of pipeline, how resources progress through it, and
 - `build-master`
     - set `serial: true` to build and execute one-by-one, rather than executing in parallel
     - set `trigger: true` to make a new build of the job when new version available on git.
-    - configure <%= @name %>-repository `uri` to change ssh link to your respository. 
+    - configure <%= @name %>-repository `uri` to change ssh link to your respository.
     - configure <%= @name %>-repository `branch` to change building branch of your respository.
 
 # Getting stated