diff --git a/docs/content/setup/docker.md b/docs/content/setup/docker.md
index b305c6164..c8ba17a55 100644
--- a/docs/content/setup/docker.md
+++ b/docs/content/setup/docker.md
@@ -48,6 +48,17 @@ After executing `docker-compose up`, HedgeDoc should be available at [http://127
 You can now continue to configure your container with environment variables.
 Check out [the configuration docs](/configuration) for more details.
 
+## File Permissions
+
+By default, HedgeDoc will change the permissions of the uploads directory to
+`0700` on every start of the Docker container. This is OK if you keep the files
+in a named volume, but if you want to serve the files from a webserver on your
+host (e.g. an Nginx reverse proxy) the webserver may not have the permission to
+read the files.
+
+To fix this, you can set the `UPLOADS_MODE` env variable to something other
+than `0700`.
+
 ## Upgrading
 
 !!! warning