Add ci file for tests and linters

After create service I wanna have simple ci file for tests and linters out of the box.

So, what need to do:

- [ ] add possible choose gitlab or gitlab ci file
- [ ] add test for ci files
- [ ] add linter and type checker to ci files

GitHub CI https://docs.travis-ci.com/user/languages/python/
Gitlab Ci https://docs.gitlab.com/ee/ci/examples/test-and-deploy-python-application-to-heroku.html