Refactor deploy addresses in a config file

Currently swapbox deploy script is using harcoded Ethereum mainnet addresses.

For the sake of deploying on different networks it could be better to have them as CLI args or in a config file.

Follow-up

Follow-up from "feat: add pricefeed" The following discussion from !30 should be addressed:

• @0xjac started a discussion: (+1 comment)

  If those are only for mainnet, why hard code them instead of using a config file?