This is a playground to test JavaScript. It runs a completely standard copy of Node.js on a virtual server created just for you. Every one of npm’s 300,000+ packages are pre-installed, so try it out:
var ee = require('@google/earthengine');
var privateKey = JSON.parse(process.env.gee_private_key);
ee.data.authenticateViaPrivateKey(privateKey);
ee.initialize(null, null, function() {
var collection = new ee.ImageCollection('LANDSAT/LC8_L1T_TOA');
var image = new ee.Image(collection.first());
var url = image
.visualize({bands:['B6','B5','B3'], gamma: 1.5})
.getThumbURL({dimensions:'1024x1024', format: 'jpg'});
console.log(url);
});