CI script for starting xorg server on Ubuntu 18.04

xorg.sh

# Start the X DISPLAY server.
apt_install xserver-xorg-core
sudo systemctl stop xorg.service || true
cat | sudo tee /lib/systemd/system/xorg.service <<EOF
[Unit]
Description=X Server
After=network.target

[Service]
ExecStart=/usr/bin/X :0

[Install]
WantedBy=multi-user.target
Alias=xorg.service
EOF
cat | sudo tee /etc/X11/xorg.conf <<EOF
Section "ServerLayout"
    Identifier     "Layout0"
    Screen      0  "Screen0"
EndSection

Section "Files"
EndSection

Section "Monitor"
    Identifier     "Monitor0"
    VendorName     "Unknown"
    ModelName      "Unknown"
    HorizSync       28.0 - 33.0
    VertRefresh     43.0 - 72.0
    Option         "DPMS"
EndSection

Section "Device"
    Identifier     "Device0"
    Driver         "nvidia"
    VendorName     "NVIDIA Corporation"
    BusID          "PCI:0:29:0"
EndSection

Section "Screen"
    Identifier     "Screen0"
    Device         "Device0"
    Monitor        "Monitor0"
    DefaultDepth    24
    Option         "AllowEmptyInitialConfiguration" "True"
    Option         "ConnectedMonitor" "none"
    SubSection     "Display"
        Depth       24
    EndSubSection
EndSection
EOF
sudo systemctl reenable xorg.service
sudo systemctl start xorg.service