Log jitsi errors

src/freedombone-app-jitsi

         echo '' >> $jitsi_nginx_site
         echo '    # Logs' >> $jitsi_nginx_site
         echo '    access_log /dev/null;' >> $jitsi_nginx_site
-        echo '    error_log /dev/null;' >> $jitsi_nginx_site
+        echo '    error_log /var/lof/nginx/jitsi_error.log warn;' >> $jitsi_nginx_site
         echo '' >> $jitsi_nginx_site
         echo '    # BOSH' >> $jitsi_nginx_site
         echo '    location /http-bind {' >> $jitsi_nginx_site
     echo '' >> $jitsi_nginx_site
     echo '    # Logs' >> $jitsi_nginx_site
     echo '    access_log /dev/null;' >> $jitsi_nginx_site
-    echo '    error_log /dev/null;' >> $jitsi_nginx_site
+    echo '    error_log /var/lof/nginx/jitsi_error.log warn;' >> $jitsi_nginx_site
     echo '' >> $jitsi_nginx_site
     echo '    # BOSH' >> $jitsi_nginx_site
     echo '    location /http-bind {' >> $jitsi_nginx_site