Issue#56 ensure helm docs has been run before commit (#57)

* Add pre-commit config

* Add contribution section to README

* Fix path to README

.pre-commit-config.yaml

@@ -0,0 +1,15 @@
+repos:
+  - repo: https://github.com/norwoodj/helm-docs
+    rev: v1.2.0
+    hooks:
+      - id: helm-docs
+        args:
+          # Make the tool search for charts only under the `example-charts` directory
+          - --chart-search-root=deployment/geonode
+
+          # The `./` makes it relative to the chart-search-root set above
+          #- --template-files=./_templates.gotmpl
+
+          # Repeating the flag adds this to the list, now [./_templates.gotmpl, README.md.gotmpl]
+          # A base filename makes it relative to each chart directory found
+          #- --template-files=README.md.gotmpl

README.md

@@ -3,8 +3,6 @@
 
 # Helm Chart for Geonode
 
-Table of Contents
-=================
 - [GeoWhat?](#Geonode)
 - [Geonode-k8s](#geonode-k8s)
 - [Install Guilde](#install)
@@ -82,3 +80,23 @@ helm upgrade --cleanup-on-fail   --install --namespace geonode --create-namespac
 ```bash
 helm delete --namespace geonode geonode deployment/geonode
 ```
+
+## Contribution
+
+### Create an Issue
+
+You found a bug :lady_beetle:? 
+You have an idea how to improve :bulb:?
+Feel free to [create an issue](https://github.com/zalf-rdm/geonode-k8s/issues/new/choose)!
+
+
+### Documentation
+
+Ensure values.yaml documentation is up-to-date. 
+The [parameter documentation](deployment/geonode/README.md) is generated via [`helm-docs`](https://github.com/norwoodj/helm-docs).
+There is a pre-commit hook configuration so please ensure you install it into your local working copy via 
+
+```
+pre-commit install
+pre-commit install-hooks
+```