diff --git a/docker/config/j2_entry_point b/docker/config/j2_entry_point
new file mode 100644
index 0000000..cb7de93
--- /dev/null
+++ b/docker/config/j2_entry_point
@@ -0,0 +1,24 @@
+#!/bin/ash
+# Copyright 2017 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+# enable reading template from stdin
+if [ $1 == "-" ]; then
+    TEMPLATE=$(mktemp -u)
+    cat > $TEMPLATE
+    shift
+    exec j2 $TEMPLATE $*
+else
+    exec j2 $*
+fi