diff --git a/gerbil-manager-web/Dockerfile b/gerbil-manager-web/Dockerfile
index 722b55e..272d1cc 100644
--- a/gerbil-manager-web/Dockerfile
+++ b/gerbil-manager-web/Dockerfile
@@ -19,6 +19,10 @@ RUN printf 'server {\n\
     listen 80;\n\
     root /usr/share/nginx/html;\n\
     index index.html;\n\
+\n\
+    # Upload-Groesse: erlaubt grosse /api-Uploads (RennmausPro-Backups, Foto-Anhaenge,\n\
+    # resolved_import.json fuer den Prod-Re-Ingest via /api/import/ingest-resolved/upload).\n\
+    client_max_body_size 50m;\n\
 \n\
     # API-Aufrufe: /api/* -> API-Container /* (Praefix wird entfernt)\n\
     location /api/ {\n\