Add Lutris installer

overlay/opt/scripts/installer.sh

@@ -0,0 +1,28 @@
+
+if [[ "${script_path}" == *"opt/script"* ]]; then
+    while true; do
+        echo
+        read -p "Would you like to configure this container to install ${pkg^} on startup? (Y/N) " ans
+
+        case $ans in
+            [Yy]* ) break;;
+            [Nn]* ) exit;;
+            * ) echo "Please answer yes or no.";;
+        esac
+    done
+
+    # Install this script to the home directory init.d
+    dest_file="/home/${USER}/init.d/${script_name}"
+    cp -f "${script_path}/${script_name}" "${dest_file}"
+    # Remove anything under '#INSTALLER:'
+    sed -i '/^#INSTALLER.*$/Q' "${dest_file}"
+    # Append 'install' command
+    echo 'install' >> "${dest_file}"
+    echo
+    echo
+    echo "Installed init script '${dest_file}'"
+    echo "This script will install ${pkg^} when you next restart the container."
+    echo
+    read -s -p "Press any key to continue"
+    echo
+fi