Merge pull request #7 from webdevian/patch-1

Fix broken AWS best practices link

sources.md

@@ -5,7 +5,7 @@
 1. [12 factor applications](http://12factor.net/)
 1. [Production Quality NodeJS Applications](http://caines.ca/blog/2014/06/01/production-quality-node-dot-js-web-apps-part-i/)
 1. [OWASP Top 10 Vulnerabilities Report](http://owasptop10.googlecode.com/files/OWASP%20Top%2010%20-%202013.pdf)
-1. [AWS Security Best Practices](http://media.amazonwebservices.com/AWS_Security_Best_Practices.pdf)
+1. [AWS Security Best Practices](https://aws.amazon.com/whitepapers/aws-security-best-practices/)
 1. [Hardening Your HTTP Security Headers](https://www.keycdn.com/blog/http-security-headers/)
 1. [Monitoring 101](https://www.datadoghq.com/blog/monitoring-101-collecting-data/)
 1. [Making CSP Great Again](https://speakerdeck.com/mikispag/making-csp-great-again-michele-spagnuolo-and-lukas-weichselbaum)