update README

Author: sjmiller609

Diff for: .drone.yml

@@ -6,7 +6,6 @@ steps:
 - name: lint
   image: hashicorp/terraform:light
   commands:
-    - cp providers.tf.example providers.tf
     - terraform init
     - terraform fmt -check=true
     - terraform validate

Diff for: README.md

@@ -6,3 +6,4 @@ Requires Terraform 0.12+
 
 - Tiller
 - Istio
+- Cloud SQL Proxy