How do I set up an AngularJS app using AWS?

You should be able to just put it in an S3 bucket and make it public. You are just serving javascript, you don't need to run it off a EC2 instance.

If your app only use angular js, then you can use amazon s3 bucket to host your static website. Static website does not need any webserver. Here is the tutorial to get started.

If your app use nodejs as a server, then you need to login to your ec2 instance, and then install node js. Once installed, just run the app with node. Also make sure that you allow the nodejs port in security group setting of your instances.

I remember following this blog, whenever I deployed node+angular app for the first time.

Node-Aws-Sdk is an ec2 library that is used for calling various aws services like Amazon S3, Amazon EC2, DynamoDB, and Amazon SWF. I don't think you need this unless you are interacting with these services in your nodejs code.