fix: updates readme, add contib steps, py version in travis ci

CONTRIBUTING.md

@@ -0,0 +1,16 @@
+# Contributing
+
+First off, thanks! You can contribute to the repo via the following steps.
+
+1. Fork this repository and clone your fork into a local machine.
+2. Install poetry with: `curl -sSL https://raw.githubusercontent.com/python-poetry/poetry/master/get-poetry.py | python - --version 1.1.13`
+3. Open a terminal in the cloned folder and create a virtual environment using: `poetry shell` and install dependencies with `poetry install`
+4. You can put the environment variable in a local `.env` file
+5. Test the program `python -m unittest discover`
+6. Finally run the program with `python -m main`
+
+## Resources
+
+- [All about git](https://stackoverflow.com/q/315911)
+- [Poetry](https://python-poetry.org/)
+- [Unit testing](https://docs.python.org/3/library/unittest.html)