Only update if necessary

src/freedombone-meshweb

 TRACKER_PORT=6969
 MY_USERNAME=$USER
 ZERONET_DIR=/home/$MY_USERNAME/zeronet
+UPDATED="no"
 
 function install_zeronet_blog {
     if [ ! -f /home/$MY_USERNAME/README ]; then
         return
     fi
 
+    if [[ $UPDATED == "no" ]]; then
+        sudo apt-get update
+        UPDATED="yes"
+    fi
+
     sudo apt-get -y remove --purge apache2
     if [ -d /etc/apache2 ]; then
         sudo rm -rf /etc/apache2
 }
 
 function install_zeronet {
-  if [ -d $ZERONET_DIR ]; then
-      return
-  fi
-  sudo apt-get -y install python python-msgpack python-gevent
-  sudo apt-get -y install python-pip bittornado
-  sudo pip install msgpack-python --upgrade
-
-  git clone $ZERONET_REPO $ZERONET_DIR
-  if [ ! -d $ZERONET_DIR ]; then
-      exit 56823
-  fi
-  cd $ZERONET_DIR
-  git checkout bashrc/bootstrap-file
+    if [ -d $ZERONET_DIR ]; then
+        return
+    fi
+
+    if [[ $UPDATED == "no" ]]; then
+        sudo apt-get update
+        UPDATED="yes"
+    fi
+
+    sudo apt-get -y install python python-msgpack python-gevent
+    sudo apt-get -y install python-pip bittornado
+    sudo pip install msgpack-python --upgrade
+
+    git clone $ZERONET_REPO $ZERONET_DIR
+    if [ ! -d $ZERONET_DIR ]; then
+        exit 56823
+    fi
+    cd $ZERONET_DIR
+    git checkout bashrc/bootstrap-file
 }
 
 if [ -f /var/lib/batman ]; then
 
 if [[ $SERVER_INSTALLATION == "no" ]]; then
     if [ ! -f /tmp/meshtype ]; then
-        sudo apt-get update
         install_web_server
         install_zeronet
         install_zeronet_blog