README with some "how to run this correctly" instructions

[jamiew]

What is correct setup procedure for READ_ONLY_REDIS_URL? Used for the vote data on closed votes

App works fine otherwise

Maybe add some nodejs engines or other best practices

cc @jthiller

[jthiller]

I think there is something specific to your config/install of yarn. I get no complaints of redis and this branch runs fine without the env file.

Let's pull that part and should be good to go.

Typically I run npm run dev to skirt the linting errors... probably why there are so many of them.

[jamiew]

App works fine unless you go to Closed tab, which hits these API pages which error out

Offhand looks like there are 3 ENV vars:

READ_ONLY_REDIS_URL
REDIS_URL
API_URL

but only READ_ONLY_REDIS_URL is required, the other two have defaults