added some info on vagrant to the help for devs

diff --git a/doc/Github.md b/doc/Github.md
index 918dee1ffbe43f1550455a4602db4e39aedc05aa..a59f574cfbd4e10fbfc235f80f77d32b03defb8f 100644 (file)
--- a/doc/Github.md
+++ b/doc/Github.md
@@ -23,3 +23,14 @@ There are two branches in the main repo on Github:
 Please pull in any changes from the project repository and merge them with your work **before** issuing a pull request. We reserve the right to reject any patch which results in a large number of merge conflicts. This is especially true in the case of language translations - where we may not be able to understand the subtle differences between conflicting versions.
 
 Also - **test your changes**. Don't assume that a simple fix won't break something else. If possible get an experienced Friendica developer to review the code. 
+
+**Vagrant**
+
+[Vagrant](https://www.vagrantup.com/) is a virtualization solution for developers. No need to setup up a webserver etc. before actually starting. Vagrant creates a virtual machine (an Ubuntu 12.04) for you that you can just run inside VirtualBox and start to work directly on Friendica. What you need to do:
+
+1. Install VirtualBox and vagrant.
+2. git clone Friendica (note the Vagrantfile inside).
+3. Run vagrant up, have some patience.
+4. Run vagrant ssh to log into the virtual machine.
+5. It depends on the network setup of your host and virtual box guest how you reach the friendica web interface of the VM.
+