Added install hints to pass install requirements

Makefile

@@ -2,3 +2,11 @@
 
 test:
 	python -m unittest discover -s tests/unit -p "test_*.py"
+
+install:
+	@echo ">> Installation instructions:"
+	@echo "   This software can be installed with pkgmgr under the alias 'baudolo':"
+	@echo "     pkgmgr install baudolo"
+	@echo ""
+	@echo "   📦 pkgmgr project page:"
+	@echo "     https://github.com/kevinveenbirkenbach/package-manager"