1. Create VPC with one public and one private subnet
2. Configure routes for private subnet and public subnet
3. Create 3 security groups - for EC2 Container Instances to be hit by loadbalancer, a security group from the application load balancer, another for the ECS Cluster
4. Create a target group with target type as IP with default health check settings.
5. Create application load balancer in the above in the VPC with the preconfigured target groups, security groups.
6. Create an ECS cluster with the above configurations
7. Launch 2 instances (here, one t2.micro, one t2.large) with ECS optimized Amazon AMI 2 and configure the ecs.config file to point to the above created ECS cluster.
8. Build the docker container image in one of the EC2 instances and push it to the ECR.
9. Create task definitions with the above docker conatiner image.
10. Create a service with 2 tasks of replica type in EC2 launch type and add the above created ALB and target group to its configuration