add ecosystem

ecosystem.config.js

 module.exports = {
   apps: [
     {
-      name: 'amber-app',
+      name: 'amber-prod',
       script: 'npm',
       args: 'start',
       env: {
-        NODE_ENV: 'development',
+        NODE_ENV: 'production',
         REACT_APP_API_URL: process.env.REACT_APP_API_URL,
         REACT_APP_API_KEY: process.env.REACT_APP_API_KEY,
         REACT_APP_API_SECRET: process.env.REACT_APP_API_SECRET,
         REACT_APP_ACCESS_TOKEN: process.env.REACT_APP_ACCESS_TOKEN,
         REACT_APP_SHOP_NAME: process.env.REACT_APP_SHOP_NAME,
+	REACT_APP_PORT: process.env.PORT,
       },
     },
   ],
-};
+};