Initial checkin of basic project skeleton. #8

Solves #8 (closed).

This is a basic project skeleton with:

• .gitignore
• gitlab ci that runs linting with pycodestyle,pylint, mypy as well as tests with pytest
• basic FastAPI app with example routes and models
• basis FastAPI tests that examplefies fixtures and test parameterization
• config.py based on pydantics setting management
• pylint config
• a README, LICENSE, and AUTHORS file