Lambda with FS operations

writeFile.js

var fs = require('fs');
var filename = "/tmp/test";

exports.handler = function(event, context) {
    fs.writeFile(filename, JSON.stringify(context), function(err) {
        if(err) {
            return console.log(err);
        }
            
        fs.readFile(filename, function(err, data) {
            if (err) {
                throw err;
            }
            context.succeed(data.toString('utf8'));
        });
    });
};