v0.1.0 - init ValidIaC project

This commit introduces an initial fork of ValidKube that provides
similar capabilities for Terraform HCLs and related files.

Four capabilities are provided:

• lint: lints HCLs using tflint
• secure: checks for security issues using tfsec
• cost: calculates costs using infracost
• map: generates graph using inframap

The four dependencies are automatically downloaded using make deps.
Their versions are defined in the Makefile.

When the ValidIaC binary is built, the location of the dependencies is
injected using Go build-time variables.

The binary can function both as an AWS Lambda function and as a simple
command-line interface.

The UI has not been modified yet, and more work is required on the
backend:

• Infracost requires an API key for usage.
• When building a lambda, injected dependency paths should probably be
  different than when build for local execution.
• The tools mostly make sense when they can work on complete directories
  of Terraform files rather than individual files. This is not addressed
  yet.

Changes

• Rebuilding Docker file, Adding missing env variables
• Changing API to ValidIaC’s needs
• InfraMap
  Adding missing arguments to InfraMap
  returning 'orphan' resources (resources without connections)
  executing inframap with 'raw' argument to support HCL
  Printing InfraMap’s Graph
• Supporting TfSec for security vulnerabilities.
• Adding missing headers in backend
  Access-Control-Allow-Credentials='true'
  Allow='GET,POST,OPTIONS'
• Rewriting README.md