add docker image

docker/entry.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+
+set -e
+
+mkdir -p $DATA_DIRECTORY
+
+if [ -z "$DISABLE_AUTHENTICATION" ]; then
+    if [ ! -f $PASSWORD_FILE ]; then
+        touch $PASSWORD_FILE
+    fi
+
+    if [ ! -s $PASSWORD_FILE ]; then
+        echo
+        echo "**WARNING** No user exists, please 'docker exec -ti \$CONTAINER_ID create_user'"
+        echo
+    fi
+else
+    rm -f $PASSWORD_FILE
+fi
+
+rest-server --listen ":80" --path $DATA_DIRECTORY