Remove setting ui server address with env var

his/main.go

@@ -21,10 +21,6 @@ func main() {
 	signal.Notify(stop, os.Interrupt)
 	wg := &sync.WaitGroup{}
 
-	if os.Getenv("UI_ADDR") != "" {
-		uiAddr = os.Getenv("UI_ADDR")
-	}
-
 	if os.Getenv("EXT_ADDR") != "" {
 		externalApiAddr = "https://" + os.Getenv("EXT_ADDR") + ":" + apiPort
 	}