Make mesh router drive read only after initial setup

src/freedombone-image-mesh

     fi
 }
 
+function make_root_read_only {
+    if [ ! -d /home/$MY_USERNAME/Desktop ]; then
+        if ! grep 'ro,subvol=@' /etc/fstab; then
+            sed -i 's|subvol=@|ro,subvol=@|g' /etc/fstab
+        fi
+    fi
+}
+
 function tmp_ram_disk {
     ramdisk_size_mb=$1
     if [ ! -d /tmp ]; then
     #setup_tahoelafs
     setup_ipfs
     mesh_amnesic
+    make_root_read_only
 
     if [ ! -f $MESH_AMNESIC ]; then
         rm $MESH_INSTALL_SETUP