make rule to create any directory

Makefile

@@ -17,6 +17,10 @@ check: ## Check you have all dependencies
 	@command -v lowdown >/dev/null || { echo "Install lowdown" && exit 1 ;}
 	@echo "All dependencies installed"
 
+%/:
+	mkdir $@
+	echo '*' > $@.gitignore
+
 ########## Network Map ##########
 
 graph_program != type graph-easy > /dev/null && printf graph-easy || printf dot