docs: update changelog, documentaiton, and helm configurations. (#63)

- Update changelog.
- Update docs to cover authorization support.
- Updates helm to support authorization, and policy file.

scripts/helm_gke.sh

@@ -0,0 +1,47 @@
+#!/bin/bash
+# PRE-REQ:
+# 1) Install Helm : You should verify the content of this script before running.
+# curl https://raw.githubusercontent.com/kubernetes/helm/master/scripts/get | bash
+
+echo "=> [GCE] creating cluster"
+gcloud container clusters create pomerium
+
+echo "=> [GCE] get cluster credentials so we can use kubctl locally"
+gcloud container clusters get-credentials pomerium
+
+echo "=> [GCE] ensure your user account has the cluster-admin role in your cluster"
+kubectl create \
+	clusterrolebinding \
+	user-admin-binding \
+	--clusterrole=cluster-admin \
+	--user=$(gcloud config get-value account)
+
+echo "=> Create a service account that Tiller, the server side of Helm, can use for deploying your charts."
+kubectl create serviceaccount tiller --namespace kube-system
+
+echo "=> Grant the Tiller service account the cluster-admin role in your cluster"
+kubectl create clusterrolebinding tiller-admin-binding --clusterrole=cluster-admin --serviceaccount=kube-system:tiller
+
+echo "=> initialize Helm to install Tiller in your cluster"
+helm init --service-account=tiller
+helm repo update
+
+echo "=> install pomerium with helm substituting configuration values as required; be sure to change these"
+helm install helm/. \
+	--set config.sharedSecret=$(head -c32 /dev/urandom | base64) \
+	--set config.cookieSecret=$(head -c32 /dev/urandom | base64) \
+	--set config.cert=$(base64 -i cert.pem) \
+	--set config.key=$(base64 -i privkey.pem) \
+	--set config.policy=$(cat policy.example.yaml) \
+	--set authentiate.idp.provider="google" \
+	--set authentiate.proxyRootDomains="pomerium.io" \
+	--set authentiate.redirectUrl="https://auth.corp.pomerium.io/oauth2/callback" \
+	--set authentiate.idp.clientID="REPLACE_ME" \
+	--set authentiate.idp.clientSecret="REPLACE_ME" \
+	--set proxy.authenticateServiceUrl="https://auth.corp.pomerium.io" \
+	--set proxy.authorizeServiceUrl="https://access.corp.pomerium.io"
+
+# When done, clean up by deleting the cluster!
+#
+# helm del $(helm ls --all --short) --purge #!!! DELETES ALL YOUR HELM INSTANCES!
+# gcloud container clusters delete pomerium