Log level updates

[ashleysommer]

• Change default sanic logger configuration to WARNING instead of INFO.
• This prevents sanic from logging accesses and other superfluous details to stdout
• Bump the version of Sanic and plugins to latest. Picks up bugfixes etc.
• Change prod method to use uvicorn instead of python directly. This is a better prod deployment method.
• Change uvicorn log level to WARNING instead of INFO. This prevents uvicorn from logging accesses and other superfluous details to its log.