Merge branch 'several-fixes' into 'main'

Several small fixes

See merge request !22

cookiecutter.json

 {
     "project_name": "My Awesome App",
     "project_slug": "{{ cookiecutter.project_name.lower()|replace(' ', '_')|replace('-', '_')|replace('.', '_')|trim() }}",
+    "project_url": "git.astron.nl/{{ cookiecutter.project_slug }}",
     "description": "An example package for CI/CD working group"
 }

{{cookiecutter.project_slug}}/.gitignore

 dist/*
 *.egg-info
 *.pyc
+.tox
 
 .coverage
 coverage.xml
 htmlcov/*
+build
+dist
 
 # Setuptools SCM
 {{cookiecutter.project_slug}}/_version.py

{{cookiecutter.project_slug}}/README.md

 # {{cookiecutter.project_name}}
 
-<!-- TODO: replace  -->
-![Build status](https://git.astron.nl/templates/python-package/badges/main/pipeline.svg)
-![Test coverage](https://git.astron.nl/templates/python-package/badges/main/coverage.svg)
+![Build status]({{cookiecutter.project_url}}/badges/main/pipeline.svg)
+![Test coverage]({{cookiecutter.project_url}}/badges/main/coverage.svg)
 <!-- ![Latest release](https://git.astron.nl/templates/python-package/badges/main/release.svg) -->
 
 An example repository of an CI/CD pipeline for building, testing and publishing a python package.