Document corrections for AMP Readme

AWS Managed Prometheus and AWS Grafana Readme

AWS Managed Service for Grafana Workspace Image

AWS Managed Prometheus and Managed Grafana Design

tfsec repo branch updated to master

Git workflow added for Terraform static code analysis using tfsec

Enable Self managed node groups with custom AMI for Linux and Windows instances

* Added Ingress Nginx Controller module and set default values for all helm chart variables in root variables.tf file. Fixed naming convention limit error for public node group

* Added conditions to avoid failures when AMP(managed prometheus) is not enabled

* aws-for-fluent-bit updated with helm chart version 0.1.11

Terraform upgrade to 1.0.1 with EKS 1.20

README corrected for Agones and tfvars files update to reflect the worker node groups in main.tf file

Feature/gaming agones

Added more links in README, and fixed wording in a few places

Setting version for VPC module

Feature/bottlerocket

Updated Readme doc with typos

Updated README with cloning repo link

Initial commit for aws eks accelerator for terraform