automate continuous integration checks

[acdoering68]

As a developer I need automated continuous integration checks So that new code will be checked

Details and Assumptions

* github actions allow this    

Acceptance Criteria

gherkin 
Given [some context]
When [certain action is taken]
Then [the outcome of action is observed]

[acdoering68]

GitHub Actions will be used for the automation workflow

• The workflow must include code linting and testing
• The Docker image should be postgres:alpine for the database
• A GitHub Actions badge should be added to the README.md to reflect the build status