fix this code (EXPERTS ONLY) - complete source code attached (15 lines)

Job ID: 35108953

Budget: $10 – $30 USD

The attached code should print "Hello World!".
Currently it's not working. I need the code to be fixed.
The fix must follow the following STRICT requirements:
1. Before you start, please "npm install express".
2. You may modify the object "res" which is defined in line 9. That includes adding more lines of code before the app.handle() call, to patch missing functions into the "res" object as needed. The only thing you may do to the res object is add missing functions. No other changes are allowed. You can find out what are the missing functions, by executing the code and reading the error message, and by tracing the express-js code inside your node_modules.
3. No other lines of code are to be added, removed, or modified.
4. When the code is working, what should happen is that the app.handle() will internally call the lambda passed to app.get(), which in turn will call the function assigned to res.send(), causing the last line "console.log(res.sent)" to output the string "Hello World!" passed from line 6.

If you are not a nodejs javascript expert, please do not waste your time and mine by trying to understand this project.
If you are a true expert, you will understand it right away and will solve it in 20 minutes.
Related categories: Express JS Reverse Engineering