Add logger from commons

[Siegrift]

Closes #8

Rationale

Adds the logger from @api3/commons.The logger accepts some configuration and I've opted in configuration from ENVs. Alternative would be to put the logger configuration to config.json, but it creates a wierd dependency of not being able to use logger until the config is loaded (similarly, if config fails to load you can't log it).

The implementation is very similar to pusher.

[aquarat]

LGTM, nice a neat, I didn't see any specific issues.
I found it odd that the imports in src/env/env.ts are separated by new lines, but that's super minor.

[Siegrift]

I found it odd that the imports in src/env/env.ts are separated by new lines, but that's super minor.

That is part of ESLint. It takes care of grouping imports and each group is separated by new line.