feat: prepare PyPi upload

Makefile

@@ -0,0 +1,29 @@
+.PHONY: install
+install:
+	[ -z "$${VIRTUAL_ENV}" ] \
+	&& python3 -m pip install -e . --user \
+	|| python3 -m pip install -e .
+
+.PHONY: uninstall
+uninstall:
+	python3 -m pip uninstall abcddb2vcard
+	rm -rf ./*.egg-info/
+	-rm -i "$$(which abcddb2vcard)" "$$(which vcard2img)"
+
+dist: setup.py abcddb2vcard/*
+	[ -z "$${VIRTUAL_ENV}" ]  # you can not do this inside a virtual environment.
+	@echo Building...
+	python3 setup.py sdist bdist_wheel
+	rm -rf ./*.egg-info/ ./build/ MANIFEST
+
+env-publish:
+	@echo Creating virtual environment...
+	@python3 -m venv 'env-publish'
+	@source env-publish/bin/activate && pip install twine
+
+.PHONY: publish
+publish: dist env-publish
+	[ -z "$${VIRTUAL_ENV}" ]  # you can not do this inside a virtual environment.
+	@echo Publishing...
+	@echo "\033[0;31mEnter PyPI token in password prompt:\033[0m"
+	@source env-publish/bin/activate && export TWINE_USERNAME='__token__' && twine upload dist/*