fix default Icon-Theme

Dockerfile

@@ -60,14 +60,8 @@ RUN sed -i 's/^Types: deb$/Types: deb deb-src/' /etc/apt/sources.list.d/debian.s
 RUN sed -i '/%users/s/^/# /' /etc/sudoers && \
     echo "sudoers: files sss" >> /etc/nsswitch.conf && \
     echo "session required pam_mkhomedir.so skel=/etc/skel/ umask=0077" >> /etc/pam.d/common-session && \
-    mkdir -p /etc/skel/.config/lxqt && \
+    sed -i 's/icon_theme=Adwaita/icon_theme=Adwaita/' /usr/share/lxqt/lxqt.conf && \
-    cat <<'EOF' > /etc/skel/.config/lxqt/lxqt.conf
+    sed -i 's/theme=Ambiance/theme=KDE-Plasma/' /usr/share/lxqt/lxqt.conf
-[General]
-__userfile__=true
-
-[Appearance]
-icon_theme=Adwaita
-EOF
 
 RUN chmod 440 /etc/sudoers && \
     mkdir -p /etc/sssd && chown root:root /etc/sssd && chmod 755 /etc/sssd && \