Configure backports and contrib repo before update

src/freedombone-app-ipfs

         return
     fi
 
+    chroot ${rootdir} apt-get -y install nodejs
     chroot ${rootdir} apt-get -y install npm
     chroot ${rootdir} apt-get -y install libpam0g-dev fuse
 
         return
     fi
 
+    apt-get -y install nodejs
     apt-get -y install npm
     apt-get -y install libpam0g-dev fuse
 

src/freedombone-image-customise

 # Whether to enable zeronet on the mesh
 ENABLE_ZERONET=
 
+function configure_backports {
+    echo "deb http://${DEBIAN_REPO}/debian/ ${DEBIAN_VERSION}-backports main" >> $rootdir/etc/apt/sources.list
+}
+
+function configure_contrib_repo {
+    if ! grep -q "contrib" $rootdir/etc/apt/sources.list; then
+        chroot "$rootdir" sed -i "s| main| main contrib|g" /etc/apt/sources.list
+    fi
+}
+
 enable_eatmydata_override() {
     chroot $rootdir apt-get install --no-install-recommends -y eatmydata
     if [ -x $rootdir/usr/bin/eatmydata ] && \
             chroot "$rootdir" sed -i "s| main| main non-free|g" /etc/apt/sources.list
         fi
 
-        # enable contrib repo
-        if ! grep -q "contrib" $rootdir/etc/apt/sources.list; then
-            chroot "$rootdir" sed -i "s| main| main contrib|g" /etc/apt/sources.list
-        fi
-
         chroot "$rootdir" apt-get update
 
         # install proprietary wifi drivers
         DEBIAN_VERSION='jessie'
     fi
 
-    # install backports
-    echo "deb http://${DEBIAN_REPO}/debian/ ${DEBIAN_VERSION}-backports main" >> $rootdir/etc/apt/sources.list
-    chroot "$rootdir" apt-get -y update
-
     # desktop
     chroot "$rootdir" apt-get -y install mate-desktop-environment
 
 chroot "$rootdir" apt-get clean
 chroot "$rootdir" rm -rf /var/lib/apt/lists/*
 chroot "$rootdir" apt-get clean
+configure_backports
+configure_contrib_repo
 chroot "$rootdir" apt-get update
 
 cat > $rootdir/usr/sbin/policy-rc.d <<EOF