Create new ECS Cluster

Create a new ECS Cluster as shown in the snapshots below:

dashboard

Select the Cluster Template as "AWS Fargate" as shown below:

dashboard

Configure the cluster as shown below by selecting creation of Cluster in a new VPC:

dashboard

Click "Create" and wait for the cluster to be created in the new VPC.
It is a good practice to go to the VPC Service and explicitly configure the name as shown below: dashboard