Add xdg-user-dirs.

Dockerfile

@@ -175,6 +175,7 @@ RUN apt-get update && \
         w3m-img \
         wget \
         whois \
+        xdg-user-dirs \
         zip \
     && \
     sed -i 's/# en_US.UTF-8 UTF-8/en_US.UTF-8 UTF-8/; s/# en_IL UTF-8/en_IL UTF-8/; s/# he_IL.UTF-8 UTF-8/he_IL.UTF-8 UTF-8/;' /etc/locale.gen && \