Added help target to Makefile, Makefile target commands are no longer echoed

Makefile

@@ -2,18 +2,21 @@
 # Target definitions
 ####
 
+.PHONY: help
+help:
+	@grep -E '^[a-zA-Z_-]+:.*?## .*$$' $(MAKEFILE_LIST) | sort | awk 'BEGIN {FS = ":.*?## "}; {printf "\033[36m%-30s\033[0m %s\n", $$1, $$2}'
 
 # Development targets
 
 .PHONY: development-server
-development-server: # Start a development server
-	flask run --debug
+development-server: ## Start a development server
+	@python app_factory.py
 
 .PHONY: view-readme
-view-readme: # View README.md for project
-	retext --preview README.md
+view-readme: ## View README.md for project
+	@retext --preview README.md
 
 .PHONY: view-changelog
-view-changelog: # View CHANGELOG.md for project
-	retext  --preview CHANGELOG.md
+view-changelog: ## View CHANGELOG.md for project
+	@retext  --preview CHANGELOG.md