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can you share what you have so far in terms of code?

Sure, so far I have this:

const loadBalancerListener = new awsx.lb.ApplicationListener(`lb`,
    {
      port: 8080,
      protocol: "HTTPS",
      vpc: vpcConfig.vpc,
      certificateArn: config.require("sslCertificateArn"),
    });

    const cluster = new awsx.ecs.Cluster("cluster", {
      vpc: vpcConfig.vpc,
      name: `cluster`,
      securityGroups: [ securityGroup ]
    });
    

    const service = new awsx.ecs.FargateService("hasura-service", {
        cluster,
        name: `service`,
        taskDefinitionArgs: {
          containers: {
              hasura: {
                  image: "hasura/graphql-engine:v2.0.0-alpha.5",
                  memory: 128,
                  portMappings: [loadBalancerListener],
              },
          },
      },
      desiredCount: 1,
    });

I thought maybe I could pass in some different defaults into the

targetGroup

attribute of the listener:

const loadBalancerListener = new awsx.lb.ApplicationListener(`lb`,
    {
      port: 8080,
      protocol: "HTTPS",
      vpc: vpcConfig.vpc,
      certificateArn: config.require("sslCertificateArn"),
      targetGroup: {
         healthCheck: ...
      }
    );

But I get an error for missing required attributes, even though they are all optional on the interface itself. It makes it seem like I have to fully define the target group manually, in which case I might as well not use crosswalk, so I feel like I'm missing something.