Add example for azure function app using key vault reference (#114)

add examples for function app using key vault reference

quickstart/201-function-app-key-vault-ref/.tflint.hcl

@@ -0,0 +1,71 @@
+/*
+THIS FILE IS GENERATED BY TFMOD-SCAFFOLD, PLEASE DO NOT MODIFY IT.
+IF YOU WANT TO USE A CUSTOMIZED CONFIGURATION, PLEASE CREATE YOUR OWN AND
+SET THIS FILE'S PATH TO $TFLINT_CONFIG ENVVIRONMENT VARIABLE.
+*/
+
+plugin "azurerm" {
+  enabled = true
+  version = "0.18.0"
+  source  = "github.com/terraform-linters/tflint-ruleset-azurerm"
+}
+
+rule "terraform_comment_syntax" {
+  enabled = true
+}
+
+rule "terraform_deprecated_index" {
+  enabled = true
+}
+
+rule "terraform_deprecated_interpolation" {
+  enabled = true
+}
+
+rule "terraform_documented_outputs" {
+  enabled = true
+}
+
+rule "terraform_documented_variables" {
+  enabled = true
+}
+
+rule "terraform_module_pinned_source" {
+  enabled = true
+}
+
+rule "terraform_module_version" {
+  enabled = true
+}
+
+rule "terraform_naming_convention" {
+  enabled = true
+}
+
+rule "terraform_required_providers" {
+  enabled = true
+}
+
+rule "terraform_required_version" {
+  enabled = true
+}
+
+rule "terraform_standard_module_structure" {
+  enabled = false
+}
+
+rule "terraform_typed_variables" {
+  enabled = true
+}
+
+rule "terraform_unused_declarations" {
+  enabled = true
+}
+
+rule "terraform_unused_required_providers" {
+  enabled = true
+}
+
+rule "terraform_workspace_remote" {
+  enabled = true
+}