improve documentation

Author: Talento90

README.md

@@ -20,21 +20,21 @@ Health package simplifies the way you add health check to your service.
 
     // Register external dependencies	
     h.RegisterChecker("redis", redisDb)
-	h.RegisterChecker("mongo", mongoDb)
-	h.RegisterChecker("external_api", api)
+    h.RegisterChecker("mongo", mongoDb)
+    h.RegisterChecker("external_api", api)
 	
     // Get service health status
     s := h.GetStatus()
 
     // Listen interrupt OS signals for graceful shutdown
     var gracefulShutdown = make(chan os.Signal)
-
-	signal.Notify(gracefulShutdown, syscall.SIGTERM)
-	signal.Notify(gracefulShutdown, syscall.SIGINT)
+    
+    signal.Notify(gracefulShutdown, syscall.SIGTERM)
+    signal.Notify(gracefulShutdown, syscall.SIGINT)
 
     go func() {
-	    <-gracefulShutdown
-		health.Shutdown()
+    	<-gracefulShutdown
+	health.Shutdown()
 
         // Close Databases gracefully        
         // Close HttpServer gracefully