update the Ethereum node container with the right set of dependencies.

[nimakaviani]

The docker file that deploys the Geth node installs a bunch of dependencies for solc and node and we are not entirely sure if they are required.

In an effort to make the Geth node image smaller in size, we need to investigate which of these dependencies are required to launch geth and remove the ones not required.

[nimakaviani]

Here is the reference to the Dockerfile that creates the corresponding docker image for the geth node: https://github.com/nimakaviani/contract-deployer/blob/master/Dockerfile

[nimakaviani]

PRs #47 and #70 have the required set of fixes