From 922e9838306284a931efe44a708bceb36486eb3a Mon Sep 17 00:00:00 2001
From: "S. X. Liang" <60531983+Scottpedia@users.noreply.github.com>
Date: Sun, 27 Dec 2020 23:24:12 -0500
Subject: [PATCH] Update README.md (#898)

- add note to warn users of the possible unavailability of certain instance types in certain regions.
---
 aws/README.md | 1 +
 1 file changed, 1 insertion(+)

diff --git a/aws/README.md b/aws/README.md
index 5cfa07e..dd6afcc 100644
--- a/aws/README.md
+++ b/aws/README.md
@@ -9,6 +9,7 @@ This template will create a fully-working IPsec VPN server on Amazon Elastic Com
 Available customization parameters:
 
 - Amazon EC2 instance type
+> **Note**: The instance type options offered by this template are possibly not **ALL** available in any specific region. For example, you may not be able to deploy a `m5a.large` instance in ap-east-1.(hypothetically) In that case, you might experience the following error during deployment: `The requested configuration is currently not supported. Please check the documentation for supported configurations`. Newly released regions are prone to causing that problem as there is less variaty of instances.
 - OS for your VPN server (Ubuntu 20.04/18.04/16.04, Debian 9)
 > **Note:** Before using the Debian 9 image on EC2, you need to first subscribe at the AWS Marketplace: [Debian 9](https://aws.amazon.com/marketplace/pp/B073HW9SP3).
 - Your VPN username