diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..37818c0
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1 @@
+test_repos
diff --git a/conf.d/ocfl.conf b/conf.d/ocfl.conf
index 563a780..8e277b2 100644
--- a/conf.d/ocfl.conf
+++ b/conf.d/ocfl.conf
@@ -5,6 +5,7 @@ js_include js/ocfl.js;
 server {
     listen 8080;
     server_name 0.0.0.0;
+    subrequest_output_buffer_size 16384;
 
     set $ocfl_root /etc/share/nginx/html/ocfl;
     set $ocfl_autoindex ro-crate-preview.html;