packer: track lockfile

packer/plugins.pkr.hcl

@@ -0,0 +1,16 @@
+packer {
+  required_plugins {
+    qemu = {
+      version = "~> 1"
+      source = "github.com/hashicorp/qemu"
+    }
+    vagrant = {
+      version = "~> 1"
+      source = "github.com/hashicorp/vagrant"
+    }
+    virtualbox = {
+      version = "~> 1"
+      source  = "github.com/hashicorp/virtualbox"
+    }
+  }
+}