Makefile added; targets for local action run and image building added; workflow for image building and publishing added; image building in action replaced with container pulling

Makefile

@@ -0,0 +1,43 @@
+.DEFAULT_GOAL = run
+SHELL = /bin/bash
+
+PATH := venv/bin:node_modules/.bin:$(PATH)
+
+
+help:
+	@echo "Welcome to `waka-readme-stats` github action!"
+	@echo "The action can be tested locally with: `make run`"
+	@echo "NB! For local testing Python version between ??? and ??? and NodeJS version between ??? and ??? are required"
+	@echo "The action image can be built locally with: `make container`"
+	@echo "NB! For local container building Docker version between ??? and ??? is required"
+	@echo "The action directory and image can be cleaned with: `make clean`"
+.PHONY: help
+
+venv:
+	python3 -m venv venv
+	pip install --upgrade pip
+	pip install -r requirements.txt
+
+node_modules:
+	npm i npm@next-8
+	npm i vega vega-lite vega-cli canvas
+
+dependencies: venv node_modules
+.PHONY: dependencies
+
+
+run: dependencies
+	source <(cat .env.example | sed 's/=/=/' | sed 's/^/export /') && python3 ./sources/main.py
+.PHONY: run
+
+
+container:
+	docker build -t waka-readme-stats -f Dockerfile .
+.PHONY: container
+
+
+clean:
+	rm -rf venv
+	rm -rf node_modules
+	docker rmi -f waka-readme-stats 2>/dev/null
+.PHONY: clean