Add two posts about AWS Amplify and ibrahimcesar to contributors list

Description of changes:

Added two posts to the site about AWS Amplify:

• How to deploy Docusaurus with authentication using AWS Amplify
• AWS Amplify, SAM, CDK ... What to choose for your Infrastructure as Code on AWS?!?

Also, added myself as contributor

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.