Try @file once more

docker-compose.prod.yml

@@ -25,7 +25,7 @@ services:
         - "traefik.http.routers.jekyll.rule=Host(`autonomic.zone`)"
         - "traefik.http.routers.jekyll.entrypoints=web-secure"
         - "traefik.http.routers.jekyll.tls.certresolver=production"
-        - "traefik.http.routers.jekyll.tls.options=default"
+        - "traefik.http.routers.jekyll.tls.options=default@file"
         - "traefik.http.routers.jekyll.middlewares=security@file"
 
 networks: