Retrieve onion hostname for search engine

src/freedombone

         if [ -f ${SEARCH_ENGINE_PATH}/searx/searx/settings.yml ]; then
             SEARCH_ENGINE_SECRET_KEY=$(cat $COMPLETION_FILE | grep "Search engine key" | awk -F ':' '{print $2}')
             sed -i "s|secret_key.*|secret_key : \"${SEARCH_ENGINE_SECRET_KEY}\"|g" ${SEARCH_ENGINE_PATH}/searx/searx/settings.yml
-            sed -i "s|base_url.*|base_url : \"http://${SEARCH_ENGINE_ONION_HOSTNAME}\"|g" ${SEARCH_ENGINE_PATH}/searx/searx/settings.yml
+            if [ -f /var/lib/tor/hidden_service_searx/hostname ]; then
+                SEARCH_ENGINE_ONION_HOSTNAME=$(echo /var/lib/tor/hidden_service_searx/hostname)
+                sed -i "s|base_url.*|base_url : \"http://${SEARCH_ENGINE_ONION_HOSTNAME}\"|g" ${SEARCH_ENGINE_PATH}/searx/searx/settings.yml
+            fi
         fi
     fi