add an ethereum layer

[flefevre]

we have several solutions

• https://github.com/Capgemini-AIE/ethereum-docker
• https://github.com/trufflesuite/ganache-cli

docs:

• https://medium.com/@andrenit/buildind-an-ethereum-playground-with-docker-part-2-docker-image-928f8ceaac50
• https://capgemini.github.io/blockchain/ethereum-docker-compose/
• http://1devblog.org/article/local-env-for-ethereum-smart-contracts-dev-using-docker
• https://www.ekino.com/industrialisation-de-smart-contracts-truffle/
• https://hackernoon.com/ethereum-development-walkthrough-part-2-truffle-ganache-geth-and-mist-8d6320e12269

[flefevre]

at present time we have used https://github.com/Capgemini-AIE/ethereum-docker