Added tag to email to denote staging from production.

app/config/appConfig.js

@@ -9,6 +9,8 @@ const APP_URL =
     ? process.env.APP_URL || "http://market-alarm"
     : process.env.APP_URL || `${APP_BASE_URL}:${APP_PORT}`;
 
+const STAGING = process.env.NODE_ENV !== "production";
+
 const DEFAULT_TIMEZONE = "Europe/Sarajevo";
 
 const CRAWLER_INTERVAL = parseInt(process.env.CRAWLER_INTERVAL) || 60;
@@ -48,5 +50,6 @@ module.exports = {
   MAX_REAL_ESTATES_IN_FIRST_EMAIL,
   PRINT_CRAWLER_DEBUG,
   API_MAP_KEY,
-  PROSTOR_LOGIN
+  PROSTOR_LOGIN,
+  STAGING
 };