Added section on using steam and distrobox

docs/gentoo-desktop-setup/graphical-session/distrobox.md

@@ -0,0 +1,43 @@
+It is recommended to install container manager [Distrobox](https://distrobox.it/) to install packages from other distributions like Void Linux. This can be necessary for application which are not compatible on Musl or are to annoying to compile on Gentoo. Installation is straight forward, simply add the correct USE flags and emerge the necessary packages:
+
+``` title="/etc/portage/package.use/podman"
+sys-libs/argp-standalone static-libs
+net-firewall/iptables nftables
+```
+
+``` shell-session
+sh# emerge -av argp-standalone app-containers/podman distrobox
+```
+
+Once it has finished installing create a container like a Void Linux container:
+
+``` shell-session
+sh$ distrobox create --name void -i ghcr.io/void-linux/void-glibc-full:latest -n void
+```
+
+Then you are able to enter the container like so:
+
+``` shell-session
+sh$ distrobox enter void
+```
+
+## Steam
+
+Because Steam is propriatary it has been compiled against Glibc which means it can't run on Musl. Luckily a container can run it. Once in the container install the necessary packages:
+
+``` shell-session
+sh# xbps-install -S void-repo-{nonfree,multilib{,-nonfree}}
+sh# xbps-install -S steam
+sh$ distrobox-export --app steam
+```
+
+Because this is a different container the driver packages will also have to be installed like so:
+
+``` shell-session
+When using Intel:
+sh# xbps-install -S linux-firmware-intel mesa mesa-dri vulkan-loader mesa-vulkan-intel intel-video-accel mesa-32bit mesa-dri-32bit mesa-vulkan-intel-32bit vulkan-loader-32bit
+When using AMD:
+sh# xbps-install -S linux-firmware-amd vulkan-loader mesa-vulkan-radeon amdvlk xf86-video-amdgpu mesa-vaapi mesa-vdpau mesa-dri vulkan-loader-32bit amdvlk-32bit mesa-32bit mesa-dri-32bit
+Or when using Nvidia:
+sh# xbps-install -S nvidia nvidia-opencl nvidia-libs-32bit
+```

mkdocs.yml

@@ -105,6 +105,7 @@ nav:
       - 'Session manager': gentoo-desktop-setup/graphical-session/session-manager.md
       - 'Login manager': gentoo-desktop-setup/graphical-session/login-manager.md
       - 'Window manager': gentoo-desktop-setup/graphical-session/window-manager.md
+      - 'Distrobox': gentoo-desktop-setup/graphical-session/distrobox.md
 
   - 'Void-desktop setup':
     - void-desktop-setup/index.md