clean: vagrant file, use virtualbox and bento/debian-12

p2/Vagrantfile

@@ -1,13 +1,12 @@
 Vagrant.configure("2") do |config|
-  config.vm.synced_folder ".", "/vagrant", type: "nfs"
-  config.vm.box = "debian/buster64"
+  config.vm.box = "bento/debian-12"
 
   config.vm.define "cchauvetS" do |server|
     server.vm.hostname = "cchauvetS"
     server.vm.network "private_network", :ip => "192.168.56.110"
-    server.vm.provider "libvirt" do |lv|
-      lv.cpus = "8"
-      lv.memory = "10240"
+    server.vm.provider "virtualbox" do |vb|
+      vb.cpus = "2"
+      vb.memory = "2048"
     end
     server.vm.provision "shell", path: "scripts/k3s.sh"
   end