Prerequisites section should have minimal version of runtimes and tools

[rednes]

https://awslabs.github.io/aws-cdk/getting-started.html

With reference to Getting Started, I tried to make TypeScript's AWS CDK app.
In the Compile the Code section, I got an error when building TypeScript.

https://awslabs.github.io/aws-cdk/getting-started.html#compile-the-code

$ npm run build
'es3', 'es5', 'es6', 'es2015', 'es2016', 'es2017', 'esnext' for tsconfig.json (3,19): error TS 6046: Argument for ' .

In tsconfig.json , target of compilerOptions is set to ES2018.
Therefore, TypeScript needs to be a version supporting ES2018.

ES2018 is supported by TypeScript 2.7.
microsoft/TypeScript#20342

The version of TypeScript installed in my environment is old.

$ tsc -v
Version 2.6.2

It was solved by installing the latest TypeScript and building it.

$ npm install typescript -g
$ tsc -v
Version 3.0.3
$ npm run build

It will help peeple like me that using old version TypeScript mindlessly.

[Doug-AWS]

The current "Installing and Configuring the AWS CDK" section, https://docs.aws.amazon.com/CDK/latest/userguide/install_config.html, has the following under "Prerequisites":

You must install Node.js (>= 8.11.x) to use the command-line toolkit and language bindings.

If you use Java, you must set the JAVA_HOME environment variable to the path to where you have installed the JDK on your machine to build an AWS CDK app in Java.

You must specify both your credentials and a region to use the toolkit, as described in Specifying your Credentials.

I'll add the TypeScript info, but who knows the requirements for Java, .NET/C#?

[Doug-AWS]

Assigning to Mathew as he owns the .NET port.

[Doug-AWS]

Here's what I have:

CLR version >= 4.5

[Doug-AWS]

From Aaron for C#:

.NET standard 2.0 compatible implementation:

• .NET Core >= 2.0
• .NET Framework >= 4.6.1
• Mono >= 5.4

As soon as I publish the updated doc I will provide the URL here and close this issue.

[Doug-AWS]

https://docs.aws.amazon.com/CDK/latest/userguide/install_config.html#install_config_prerequisites