standardise VBox, lower cpu specs, disk size

Vagrantfile

@@ -61,7 +61,7 @@ Vagrant.configure("2") do |config|
   config.vm.box_version = '20190627.1.0'
 
   # use public network by allowing the IP to be assigned via DHCP
-  config.vm.network "public_network", use_dhcp_assigned_default_route: true
+  #config.vm.network "public_network", use_dhcp_assigned_default_route: true
 
   # forward ports to host
   #config.vm.network "forwarded_port", guest: 80, host: 80
@@ -74,7 +74,7 @@ Vagrant.configure("2") do |config|
   config.ssh.forward_agent = true
   config.ssh.forward_x11 = true
 
-  # provision the VM 
+  # provision the VM
   config.vm.provider "virtualbox" do |vb|
     vb.cpus = 2
     #vb.memory = "8192"