Don't install peertube on mesh images for now

src/freedombone-app-peertube

 #
 # PeerTube server
 #
+# There's a problem with installing this onto mesh images, which is
+# that qemu appears to run out of RAM when using yarn to add webpack.
+#
 # License
 # =======
 #

src/freedombone-image-customise

     install_web_server
     install_pelican
     mesh_install_cryptpad
-    mesh_install_peertube
+    #mesh_install_peertube
     if [ $ENABLE_ZERONET ]; then
         install_zeronet
     fi