Add makefile

.github/main.workflow

@@ -6,4 +6,5 @@ workflow "Build and deploy pull requests" {
 action "Ruby Example" {
   uses = "./.github/ruby_action"
   secrets = ["GITHUB_TOKEN"]
+  runs = "make install && make test"
 }

Makefile

@@ -0,0 +1,21 @@
+.DEFAULT_GOAL := help
+
+.PHONY: help install clean run build test
+
+help: ##show this help
+	@fgrep -h "##" $(MAKEFILE_LIST) | fgrep -v fgrep | sed -e 's/\\$$//' | sed -e 's/##//'
+
+install: ##runs bundle install
+	bundle install
+
+clean: ##runs jekyll clean
+	bundle exec jekyll clean
+
+run: clean ##runks jekyll serve
+	bundle exec jekyll serve --config _config.yml,_config-dev.yml
+
+build: clean ##runs jekyll build
+	bundle exec jekyll build
+
+test: build ##runs jekyll build and htmlrpoofer
+	bundle exec htmlproofer --http-status-ignore "999" ./_site