5-SSM-Parameter.yaml

//we will be using ssm store to store our key and value. 
// and I will be refering it from my ssm store.

Parameters:
  InstanceType:
    Description: WebServer EC2 instance type
    Type: AWS::SSM::Parameter::Value<String>
    Default: /dev/ec2/instanceType

  ImageId:
    Type: AWS::SSM::Parameter::Value<AWS::EC2::Image::Id>
    Default: /aws/service/ami-amazon-linux-latest/al2022-ami-kernel-5.15-x86_64

Resources:
  MyEC2Instance:
    Type: AWS::EC2::Instance
    Properties:
      InstanceType: !Ref InstanceType
      ImageId: !Ref ImageId