Alex Murashkin

Specify exact version of `web3` in Dockerfile

1

Seems like Web3.py recently got updated and no longer supports Python 2.7 (compare https://pypi.org/project/web3/4.2.1/ to https://pypi.org/project/web3/3.16.5/ , the `supports` list) However, the present `Dockerfile` seems to use Python 2.7 To...