Get the Heroku hosting working

[RhodesPeter]

Heroku was working when the files were uploaded via git but not when directly from our Github. These are the error messages:

[RhodesPeter]

This was the error I was getting earlier:

SyntaxError: Block-scoped declarations (let, const, function, class) not yet supported outside strict mode

I am no longer getting this error, so I guess this is no longer a problem. I don't really know what it means anyway. The error disappeared when I replaced the consts and lets with var.

[RhodesPeter]

Update.

The package.json file main was changed from index.js to server.js which for some reason heroku was not happy about. When I change it back I get the same error about the ES6 features.

[RhodesPeter]

Fixed.

I changed the consts and lets back to vars and it is now working and hosted on Heroku here. If we have time it would be good to work out which bits of ES6 we can use and which we can't. Obviously the 'Block-scoped declarations' but I will leave this until tomorrow.

[RhodesPeter]

If we simply needed to add strict mode to all of our js files I will do one of those facepalms people do.

[RhodesPeter]

This is fixed now with commit d904bd9.

The key was to add this code to package.json. This asks Heroku to install and use the latest version of Node which will be happy with ES6 features.

"engines": {
    "node": "6.9.1"
}

[RhodesPeter]

So for next time:

1. Add this to package.json:

"engines": {
    "node": "6.9.1"
}

2. "main" in package.json should be "index.js" rather than "server.js"
3. procfile isn't needed (and throws an error), instead set up like this in package.json:

"start": "node src/server.js"

[RhodesPeter]

Also!!

server.js should look like this:

server.connection({
  port
});

Previously it looked like this:

server.connection({
    port,
    host: 'localhost'
  });

[RhodesPeter]

Update - 2017! - The whole of the server connection is actually like this:

const port = process.env.PORT || 8000;

server.connection({
  port
});