updated gitignore to add config file in root directory

Author: calvincao

.gitignore

@@ -108,9 +108,6 @@ typings/
 # dotenv environment variables file
 .env
 
-# config file for db URI 
-config.js
-
 # parcel-bundler cache (https://parceljs.org/)
 .cache
 

config.js

@@ -0,0 +1,3 @@
+module.exports = {
+  DEV_PORT: 5656
+};