[RouterOS] a duplicate default server for 0.0.0.0:81 in /etc/nginx/conf.d/production.conf

Checklist

• Have you pulled and found the error with jc21/nginx-proxy-manager:latest docker image?
  • Yes
• Are you sure you're not using someone else's docker image?
  • Yes
• Have you searched for similar issues (both open and closed)?
  • Yes

Describe the bug
I'm trying to run the docker on a Mikotik RB5009 running RouterOS 7.11 and the container fails to start with error:

nginx: [emerg] a duplicate default server for 0.0.0.0:81 in /etc/nginx/conf.d/production.conf:3

I can get the container running by deleting the file /etc/nginx/conf.d/dev.conf but I don't think this is the right way to get this working.

Nginx Proxy Manager Version
2.10.4 (ARM64)

To Reproduce
Steps to reproduce the behavior:

1. pull docker container in RouterOS
2. Start it with logging enabled
3. See error in log

Expected behavior
nginx starts

Operating System
RouterOS 7.11 (ARM64)

Additional context
I had this container running fine on this platform for months but a recent update changed something. I'm not sure if an NPM or RouterOS update is the cause. Also, the container runs without issue with the dev.conf file removed.

Start by reproducing the startup failure on RouterOS 7.11 ARM64 with the jc21/nginx-proxy-manager:latest image and inspect the logged error. Compare /etc/nginx/conf.d/dev.conf with /etc/nginx/conf.d/production.conf, especially the default server definitions on port 81. Done means the container starts with both configuration files present and nginx no longer reports a duplicate default server.