added method to set network host

setup.go

@@ -91,6 +91,7 @@ type OverflowBuilder struct {
 	PrintOptions                        *[]OverflowPrinterOption
 	GlobalEventFilter                   OverflowEventFilter
 	Path                                string
+	NetworkHost                         string
 	Network                             string
 	ScriptFolderName                    string
 	ServiceSuffix                       string
@@ -183,6 +184,9 @@ func (o *OverflowBuilder) StartResult() *OverflowState {
 		overflow.Error = err
 		return overflow
 	}
+	if o.NetworkHost != "" {
+		network.Host = o.NetworkHost
+	}
 	overflow.Network = *network
 
 	logger := output.NewStdoutLogger(o.LogLevel)
@@ -503,6 +507,13 @@ func WithEmulatorOption(opt ...emulator.Option) OverflowOption {
 	}
 }
 
+// Set custom network host if different from the one in flow.json since we cannot env substs there
+func WithNetworkHost(host string) OverflowOption {
+	return func(o *OverflowBuilder) {
+		o.NetworkHost = host
+	}
+}
+
 func WithUnderflowOptions(opt underflow.Options) OverflowOption {
 	return func(o *OverflowBuilder) {
 		o.UnderflowOptions = opt