feat(metal): add dev VM for local development or evaluation

metal/Vagrantfile

@@ -0,0 +1,20 @@
+Vagrant.configure("2") do |config|
+  config.vm.box = "rockylinux/8"
+
+  config.vm.define "test" do |test|
+    test.vm.network "private_network", ip: "192.168.56.101"
+    test.vm.hostname = "dev0"
+  end
+
+  config.vm.provider "virtualbox" do |vb|
+    vb.cpus   = 4
+    vb.memory = "8192"
+  end
+
+  config.vm.provision "file", source: "~/.ssh/id_ed25519.pub", destination: "/tmp/id_ed25519.pub"
+
+  config.vm.provision "shell", inline: <<-SHELL
+    mkdir /root/.ssh
+    cat /tmp/id_ed25519.pub >> /root/.ssh/authorized_keys
+  SHELL
+end