diff --git a/init/entrypoint.sh b/init/entrypoint.sh
new file mode 100644
index 0000000..98efa0d
--- /dev/null
+++ b/init/entrypoint.sh
@@ -0,0 +1,10 @@
+#!/bin/sh
+set -eox pipefail
+
+if [ ! "$RUN_ONCE" -eq "true" ]; then
+        rsync -avz $SOURCE_DIR $TARGET_DIR
+else
+    while inotifywait -r -e modify,create,delete,move $SOURCE_DIR; do
+        rsync -avz $SOURCE_DIR $TARGET_DIR
+    done
+fi
\ No newline at end of file