Add a couple of notes to the vagrant instructions

diff --git a/VAGRANT.md b/VAGRANT.md
index 549e06687f66216bd8d311e44833b2e5ffccbffe..3825ad988242567e0e4af260b1e850c8faf04f05 100644 (file)
--- a/VAGRANT.md
+++ b/VAGRANT.md
@@ -6,10 +6,13 @@ On Ubuntu, it should be as simple as:
 sudo apt-get install vagrant
 ```
 
-Other Linux distributions should have similar installation instructions using `yum` or similar.
+Other Linux distributions should have similar installation instructions using `dnf`, `pacman`, or similar.
 
 Installers are available for Mac OS X and Windows, please see the [Vagrant project download page](http://www.vagrantup.com/downloads.html) for more information.
 
+Note than until there are suitable _xenial64_ [vagrant boxes](https://atlas.hashicorp.com/boxes/search?utf8=%E2%9C%93&sort=&provider=&q=xenial64) for other providers,
+the only virtualization provider supported is virtualbox. You might need to install it and specify `--provider virtualbox` when setting up your environment.
+
 # Setting up openstreetmap-website
 
 Once Vagrant has been installed, you can start an environment by checking out the openstreetmap-website code if you haven't already, then changing to the directory which contains the Vagrantfile by typing: