ADD[#126]: an example to create a basic EC2 instance with simple effort

[vivekvr1]

Closes: #126

Be noted that 126 is the issue ID

What is the purpose of the change

• Added a new folder called ec2/basic to the getting-started directory.
• Created a new file called main.tf in the ec2/basic directory.
• Added the Terraform code to create a basic EC2 instance to the main.tf file.

Add a description of the overall background and high level changes that this PR introduces

• This pull request adds a new example to the tungbq/aws-lab-with-terraform repository that shows how to create a basic EC2 instance with Terraform. This example will be helpful for users who are new to Terraform and want to learn how to create an EC2 instance.

(E.g.: This pull request improves documentation of area A by adding ....)

[tungbq]

Hello @vivekvr1 I hope this comment finds you well.
Did you run this code successfully to verify?