setting systemd-nspawn "container" for steam gaming in with amdgpu (archlinux)

nspawn_gaming_amd

mkdir gamecontainer
sudo pacstrap -i -c gamecontainer base nano sudo bash-completion 
sudo arch-chroot gamecontainer

useradd gamer
passwd gamer
mkdir /home/gamer
chown -R gamer:gamer /home/gamer
sed -i /etc/sudoers -re 's/^# %sudo.*/gamer ALL=(ALL:ALL) ALL/g'
sed -i /etc/sudoers -re 's/^root.*/root ALL=(ALL:ALL) NOPASSWD: ALL/g'


sudo systemd-nspawn -bD gamecontainer -M "gamecontainer"

##########
##pacman##
##########
sudo pacman-key --init
sudo pacman-key --populate archlinux

# allow for colored output in pacman.conf
sudo sed -i "s/#Color/Color/" /etc/pacman.conf

# uncomment multilib repo
sudo sed -i '/#\[multilib\]/,/#Include = \/etc\/pacman.d\/mirrorlist/ s/#//' /etc/pacman.conf 

printf " \n[chaotic-aur]\n## By: GarudaLinux and Fosshost\nServer = https://builds.garudalinux.org/repos/\$repo/\$arch\n \
## By: LordKitsuna\nServer = https://repo.kitsuna.net/\$arch\n" | sudo tee -a /etc/pacman.conf

sudo pacman-key --keyserver hkp://keyserver.ubuntu.com -r 3056513887B78AEB 8A9E14A07010F7E3
sudo pacman-key --lsign-key 3056513887B78AEB
sudo pacman-key --lsign-key 8A9E14A07010F7E3
sudo pacman -Sy chaotic-keyring
sudo pacman-key --populate chaotic

sudo pacman -S gedit steam steam-native-runtime mangohud-git lib32-mangohud-git mesa-tkg-git lib32-mesa-tkg-git \
lib32-vulkan-icd-loader vulkan-icd-loader wine-tkg-staging-fsync-git yay gamescope
set +o posix

###################
##/etc/environment##
###################
printf " \nDISPLAY=:0.0\nPULSE_SERVER=unix:/run/gamer/host/pulse/native\nXAUTHORITY=/tmp/container_xauth\n \
MESA_SHADER_CACHE_DISABLE=1\n#MESA_GLSL_CACHE_DIR=/home/gamer/mesa\nDRI_PRIME=/dev/dri/renderD128\n" | sudo tee -a /etc/environment

#######
   touch /tmp/container_xauth && xauth nextract - "$DISPLAY" | sed -e 's/^..../ffff/' | xauth -f /tmp/container_xauth nmerge - 
#######

    sudo systemd-nspawn -bD gamecontainer -M "gamecontainer" \
  --setenv=XAUTHORITY=/tmp/container_xauth --setenv=DISPLAY=$DISPLAY \
 --setenv=PULSE_SERVER=unix:/run/user/host/pulse/native \
 --capability=all --volatile=no --property=CPUQuota=600%  \
 --bind=/dev/snd --bind=/dev/kvm --bind=/dev/dri/ --bind=/proc/asound  \
 --bind=/tmp/.X11-unix --bind=/tmp/container_xauth --bind=/proc/devices \
 --bind=/dev/shm --property="DeviceAllow=/dev/shm rwm" \
 --property="DeviceAllow=/dev/kvm" --property="DeviceAllow=/dev/dri/render128" \
 --property="DeviceAllow=char-usb_device rwm" --property="DeviceAllow=char-input rwm" \
 --property="DeviceAllow=char-alsa rwm" --property="DeviceAllow=char-drm rwm" \
 --bind=/run/user/1000/pulse:/run/user/host/pulse \
 --bind=/run/media/steam_linux:/home/user/steam/steam_linux \
 --bind=/run/media/steam_proton:/home/user/steam/steam_proton \
 --bind=/run/media/Games:/home/user/Games

#######

    machinectl shell user@gamecontainer 
    
######
DRI_PRIME=/dev/dri/renderD128  -- render-node instead of the full graphics card interface.