Adding icons and desktop wallpaper

Dockerfile

@@ -316,6 +316,14 @@ RUN apt-get update \
         zip \
         zstd \
         gir1.2-wp-0.5 \
+        ubuntu-wallpapers \
+        adwaita-icon-theme \
+        elementary-xfce-icon-theme \
+        greybird-gtk-theme \
+        hicolor-icon-theme \
+        humanity-icon-theme \
+        keyboard-configuration \
+        tango-icon-theme \
     && sed -i \
         -e 's#/var/log/nginx/access\.log#/dev/stdout#g' \
         -e 's#/var/log/nginx/error\.log#/dev/stderr#g' \