Documentation: Add a rough guide on setting up SPICE on Ubuntu

Only covers Ubuntu for now (since that's what I use), thought it might
be good to put this somewhere, since I had to search around for the
setup.

Documentation/SpiceIntergration.md

@@ -0,0 +1,38 @@
+# Setting up SPICE integrations
+
+# Ubuntu
+
+1. Build QEMU via `Toolchain/BuildQemu.sh`
+2. Install virt-viewer 8.0
+     * On 23.04+ just do `sudo apt-get install virt-viewer`
+     * For earlier versions you need to build it from source (see below).
+3. export SERENITY_SPICE=1
+4. Meta/serenity.sh run
+
+## Building + installing `virt-viewer`
+
+**Note:** If you installed an old version from `apt` uninstall that first (`sudo apt-get purge virt-viewer`).
+
+
+Install the build dependencies:
+```
+sudo apt-get install libvirt-glib-1.0 libvirt-dev spice-client-gtk-3.0 spice-client-glib-2.0 intltool
+```
+
+Fetch and extract the sources:
+```
+wget https://releases.pagure.org/virt-viewer/virt-viewer-8.0.tar.gz
+tar -xvf virt-viewer-8.0.tar.gz
+```
+
+Configure and build:
+```
+cd ./virt-viewer-8.0
+./configure --with-spice-gtk
+make
+```
+
+Install:
+```
+sudo make install
+```