Describe the bug

According to https://nginx.org/en/docs/ngx_core_module.html#error_log default error_log level for Nginx should be error, but official docker image is built with level notice. This produces all sorts of issues in logging/monitoring systems. Most often, just graceful ordinary restart produces errors in logs (and then alerts).

To reproduce

Steps to reproduce the behavior:

1. Run the NGINX Docker image.
2. Check /var/log/nginx/error.log for startup notices (which are not actually errors).

Expected behavior

error_log should be set to error or maybe warn level, definitely not notice.

Your environment

• nginx:1.25.1-alpine-slim
• Kubernetes / Docker Desktop