Make SID repo optional

Dockerfile.debian

@@ -543,7 +543,8 @@ ENV \
     STEAM_ARGS="-silent" \
     ENABLE_SUNSHINE="true" \
     ENABLE_EVDEV_INPUTS="true" \
-    ENABLE_WOL_POWER_MANAGER="false"
+    ENABLE_WOL_POWER_MANAGER="false" \
+    ENABLE_SID="false"
 
 # Configure required ports
 ENV \

overlay/etc/cont-init.d/60-configure_gpu_driver.sh

@@ -148,8 +148,10 @@ function install_deb_mesa {
     if [ ! -f /tmp/init-mesa-libs-install.log ]; then
         print_step_header "Enable i386 arch"
         dpkg --add-architecture i386
-        print_step_header "Add Debian SID sources"
-        echo "deb http://deb.debian.org/debian/ sid main" > /etc/apt/sources.list
+	if [ "${ENABLE_SID:-}" = "true" ]; then
+            print_step_header "Add Debian SID sources"
+            echo "deb http://deb.debian.org/debian/ sid main" > /etc/apt/sources.list
+	fi
         apt-get update &>> /tmp/init-mesa-libs-install.log
         print_step_header "Install mesa vulkan drivers"
         echo "" >> /tmp/init-mesa-libs-install.log