Update docs

Makefile

@@ -1,14 +1,20 @@
-duild:
+.PHONY: test
+.DEFAULT_GOAL := help
+
+help: ## Output usage documentation
+	@echo "Usage: make COMMAND [args]\n\nCommands:\n"
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf " \033[36m%-20s\033[0m %s\n", $$1, $$2}'
+
+duild: ## Build necessary image for building packages
 	cd image && IMAGE_NAME=php-fpm-7.1-alpine ../hooks/build
 
-.PHONY: test
-test: test-static-analysis test-environment
+test: lint env-validate ## Run all tests
 
-test-environment: duild
+env-validate: duild ## Testing requirements for environment
 	cd test && ./run.sh
 
-test-static-analysis:
-	shellcheck --exclude=SC2148 Makefile
+lint: ## Run static analysis
+	shellcheck --exclude=SC2148,SC2046 Makefile
 	shellcheck hooks/*
 	shellcheck test/*.sh
 	shellcheck test/**/*.sh