Create launch template in AWS CLI

aws ec2 create-launch-template 
  --launch-template-name my-template-for-auto-scaling 
  --version-description version1
  --launch-template-data file://config.json

config.json

{ 
  "ImageId":"ami-04d5cc9b88example", 
  "InstanceType":"t2.micro", 
  "SecurityGroupIds":["sg-903004f88example"] 
}

aws ec2 create-launch-template 
  --launch-template-name my-template-for-auto-scaling 
  --version-description version1 
  --launch-template-data 
    '{
      "ImageId":"ami-04d5cc9b88example",
      "InstanceType":"t2.micro",
      "SecurityGroupIds":["sg-903004f88example"]
      }'