code: func loadBalancerType(app *twelvefactor.Manifest, process *twelvefactor.Process) string {
  	check := []string{
  		"EMPIRE_X_LOAD_BALANCER_TYPE",
  		"LOAD_BALANCER_TYPE", // For backwards compatibility.
  	}
  	env := twelvefactor.Env(app, process)
  
  	for _, n := range check {
  		if v, ok := env[n]; ok {
  			return v
  		}
  	}
  
  	// Default when not set.
  	return classicLoadBalancer
  }
docs: // Returns the type of load balancer that should be used (ELB/ALB).