docker container for smart contracts

[owocki]

from @mbeacom:

also, I found myself running smart_contracts with testrpc quite a bit while testing things for gitcoinco/web.  Do you think it'd be valuable to add a `smart_contracts` container to the docker-compose stack for `web` ? Or just document how to sidecar it in the event they need to test something?

i think the answer is yes

[mbeacom]

Raising a PR for this shortly!

[sc0Vu]

@owocki I think we could using testrpc as provider to test(we don't need to run testrpc).

[mbeacom]

If we're going to use standard testrpc, we might as well just instruct the user to use the official/provided ganache-cli docker image from docker hub. So we could just delete the Dockerfile and use trufflesuite/ganache-cli

[mbeacom]

Made the above changes in #13

[step21]

I think the really useful part would be to add automatic deployment of smart-contracts to this image, or at least document it better.

[owocki]

thats a good idea