Ubuntu 16.04 with Python 3.6 devcontainer

[MiniaczQ]

I tried to run clamp and went through the repository instructions for the environment, since the requirements didn't really work on my Windows or Ubuntu. In the end it turned out that the README.md is misleading and that was all unnecessary to just run clamp. (It has it's own requirements which work on modern Windows)

Whatever the case, I prepared this environment and I don't want it to go to waste.

The image builds python3.6 from source using deadsnakes repository. I've ran into multiple security warnings while collecting this setup, so use at your own risk.

[MiniaczQ]

@microsoft-github-policy-service agree