Node.js / Express server: Fix OPTIONS request (Cors) -- 2

A request that work in local (POST) environment, dont work in Node.js production server with Firefox or Chrome. It does with IE. Seems a cors problem (OPTIONS). ::ffff:[login to view URL] - - [10/Sep/2017:19:10:35 +0000] "OPTIONS /api/postals HTTP/1.1" 204 - ::ffff:[login to view URL] - - [10/Sep/2017:19:10:35 +0000] "POST /api/postals HTTP/1.1" 302 28 This fix should be fast and easy with the required knowledge. Already tried to change express, nginx, angular... but dont know how to configure properly: var cors = require('cors'); ... [login to view URL](cors()); Issue posted here: [login to view URL] Have you ever faced this issue? Thanks,