express-feature-flags__sdk-initialize.js

const optimizelyExpress = require('@optimizely/express');
const optimizely = optimizelyExpress.initialize({
  sdkKey: '<Your_SDK_Key>',
  datafileOptions: {
    autoUpdate: true,      // Indicates feature flags will be auto-updated based on UI changes 
    updateInterval: 1*1000 // 1 second in milliseconds
  },
  logLevel: 'info',        // Controls console logging. Can be 'debug', 'info', 'warn', or 'error'
});