@alloy: Use forever and max_old_space size to cap memory usage

[craigspaeth]

Adds the --max_old_space_size flag to cap memory usage in Heroku, see nodejs/node#3370. Also added forever for good measure to restart on crashes.

[alloy]

In Slack you had pointed me to the Makefile, why is this PR different?

[alloy]

CI is 🔻 regarding installation of yarn. Does it need a rebuild without cache or something?

[alloy]

I also don’t see an update to the yarn.lock file, you should check-in those changes.

[craigspaeth]

Oh right, I forgot we're using Yarn now. Will update.

We used a Makefile in Force b/c that was one of the popular ways to do it at the time Force was born. Nowadays it's more common to just use the package.json scripts field like we, mostly, do here. The only other thing we're also using here is Foreman + Procfiles to load a .env file and run different commands for dev/production. FWIW we can further consolidate this to just a package.json file by using dotenv.

... so many finicky build tool ideas in Node land.

[alloy]

Ooowww… It’s totally my bad, I didn’t realise I was looking at Force’s codebase, not metaphysics 😞 Thanks for clearing that up!

[alloy]

@orta Do you have any ideas from the top of your head about this CI failure re yarn installation?

[orta]

Fixed 👍

[craigspaeth]

Thanks Orta!