+# If you want to keep your Citadel data in a specific directory on the host,
+# set CTDL_VOL to "bind" and CTDL_DIR to the full pathname of that directory.
+# This is what you want if you are switching from Easy Install to Docker.
+#
+#CTDL_VOL=bind
+#CTDL_DIR=/usr/local/citadel
+
+# If you want to keep your Citadel data in a Docker volume,
+# set CTDL_VOL to "volume" and CTDL_DIR to the name of the volume.
+#
+CTDL_VOL=volume
+CTDL_DIR=citadel-data
+
+docker version >/dev/null 2>&1 || {
+ echo Docker engine is not installed on this host.
+ exit 1
+}
+