rename to .docker, fixes #95.

.docker/xfce/Dockerfile

@@ -0,0 +1,20 @@
+ARG BASE_IMAGE=m1k1o/neko:base
+FROM $BASE_IMAGE
+
+#
+# install xfce
+RUN set -eux; apt-get update; \
+    apt-get install -y --no-install-recommends xfce4 xfce4-terminal sudo; \
+    #
+    # add user to sudoers
+    usermod -aG sudo neko; \
+    echo "neko:neko" | chpasswd; \
+    echo "%sudo ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers; \
+    # clean up
+    apt-get clean -y; \
+    rm -rf /var/lib/apt/lists/* /var/cache/apt/*
+
+#
+# copy configuation files
+COPY supervisord.conf /etc/neko/supervisord/xfce.conf
+