Update CONTRIBUTING.md to mention adding a worker (and the charges that will result)

[Faeranne]

With worker.js, the minimum cost to test the app is now $32, since worker needs it's own dynamo. We should point this out in the README/testing documentation, since this will require adding a credit card.

[openjck]

Nice catch. At the moment, README.md mainly focuses on using Discord and TESTING.md mainly focuses on running unit and code quality tests. Would CONTRIBUTING.md be a good place for this? We have a note here but could always expand that explanation.

[Faeranne]

Right, but the redis doesn't cause a charge, the dynamo will result in a
charge, and would require making sure the dynamos are shutdown after
testing, less they charge the full $32.
CONTRIBUTING.md makes sense, since that is where the link for PR and Issues
goes.

On Fri, Aug 14, 2015, 12:58 John Karahalis notifications@github.com wrote:

Nice catch. At the moment, README.md mainly focuses on using Discord
and TESTING.md mainly focuses on running unit and code quality tests.
Would CONTRIBUTING.md be a good place for this? We have a note here
9c98eb2#diff-6a3371457528722a734f3c51d9238c13R14
but could always expand that explanation.

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[openjck]

Ah, good point. A credit card number is required when installing Redis (for verification) but the charges are different. Sounds good to me.

[openjck]

I think we neglect to mention scaling up a worker, too. We could add both those notes in one PR.