Step Function manage/trigger Fargate task container override storage size?

Hi, We successfully trigger fargate task through step function, Something like below:

• Is there anyway to define the ephemeral storage size, cpu and memory within the container override section below?
• Now, when we create fargate task, we set desire_count=0, min_count=0 and we have 0 instance always on (which is good, we don't want to always on instance). But how will max_count be treated? When we have more than max_count of concurrent step function running, will some step just hanged and waiting for the finishment of certain fargate task? Or throwing error?

Thank you , in advance.

"UncompressGranuleECS": { "Parameters": { "LaunchType": "FARGATE", "Cluster": "${module.cluster.ecs_cluster_name}", "TaskDefinition": "${local.fargateTaskARN}", "NetworkConfiguration": { "AwsvpcConfiguration": { "Subnets": ${jsonencode(var.subnet_ids)}, "AssignPublicIp": "DISABLED" } }, "Overrides": { "ContainerOverrides": [ { "Name":"dyen-cumulus-uncompress_granule-fargate",

              "Command": ["java",
                   "-Xms7500M", 
                   "-Xmx7500M",
                   "-jar",
                   "/home/dockeruser/build/libs/my-jarfile.jar"],
              "Environment":[  
                {  
                    "Name":"region",
                    "Value":"us-west-2"
                },
                {  
                    "Name":"TASK_TOKEN",
                    "Value.$":"$$.Task.Token"
                },
                {  
                    "Name":"CMA_MESSAGE",
                    "Value":"myjson:[]"
                }
              ]
            }
        ]
      }
    },
    "Type": "Task",
    "HeartbeatSeconds": 1800,
    "Resource": "arn:aws:states:::ecs:runTask.waitForTaskToken",
    "Retry": [
      {
        "ErrorEquals": [
          "States.ALL"
        ],
        "IntervalSeconds": 10,
        "MaxAttempts": 0
      }
    ],
    "Catch": [
      {
        "ErrorEquals": [
          "States.ALL"
        ],
        "ResultPath": "$.exception",
        "Next": "failureStep"
      }
    ],
    "Next": "MissingStep"
  },