pin requirements and some cleanup

[cs01]

• create requirements.in
• run pip-compile requirements.in > requirements.txt
• use requirements.txt for the setup.py file
• Turn off flask's noisy logging in the terminal
• Update installation instructions in readme
• Use xerm's onData instead of onKey to handle new terminal input (https://xtermjs.org/docs/guides/encoding/)
• Add nox session nox -s run to run the server without having to setup a virtual env
• Update email
• Autoformat js code
• Add logging with --debug flag
• Add CHANGELOG.md