Heroku “State changed from starting to down Stopping all processes with SIGTERM”

Question

After booting up my Node.js Heroku app with this Procfile:

web: node www/main.js

I used to get:

Error R10 (Boot timeout

Answer 1

socket = io.listen(process.env.PORT);

Do this in your main.js file, and revert back to web: node www/main.js