To host a website with Nginx on TrueNAS Scale using a Docker container, you'll need to mount your website documents, such as HTML files, to the Docker container. First, make sure your website files are available on the host system. Then, you can use Docker's volume mounting feature to link these documents to the Nginx container.
When you start the Nginx Docker container, include a volume flag in your Docker run command, specifying the path to your website documents on the host and the path inside the container where Nginx serves its web content (typically "/usr/share/nginx/html"). This way, your website documents will be accessible to Nginx, and your site should be viewable through the IP address you saw in the log.