Add snapshot and restore

test/Makefile

@@ -1,10 +1,13 @@
 .POSIX:
 
-default: init metal infra
+default: init snapshot metal infra
 
 init:
 	vagrant up
 
+snapshot:
+	vagrant snapshot save init
+
 metal:
 	python3 -m venv .venv \
 		&& . .venv/bin/activate \
@@ -18,5 +21,8 @@ infra:
 stop:
 	vagrant halt
 
+restore:
+	vagrant snapshot restore init
+
 clean:
 	vagrant destroy -f