See: https://laracasts.com/discuss/channels/servers/development-environment-on-windows

Vagrantfile

hostname          = "localhost.dev"
boxname           = "VBlocalhost"
server_ip         = "192.168.22.10"
server_cpus       = "1"
server_memory     = "512" # in MB

Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/trusty64"
  config.vm.hostname = hostname
  config.vm.network :private_network, ip: server_ip
  config.vm.network :forwarded_port, guest: 80, host: 8000
  config.vm.synced_folder ".", "/vagrant", :mount_options => ["dmode=777", "fmode=666"]
  # Custom settings for VirtualBox
  config.vm.provider :virtualbox do |vb|
    vb.name = boxname
    vb.customize ["modifyvm", :id, "--cpus", server_cpus]
    vb.customize ["modifyvm", :id, "--memory", server_memory]
    vb.customize ["guestproperty", "set", :id, "/VirtualBox/GuestAdd/VBoxService/--timesync-set-threshold", 10000]
  end
end