Straight 
NGINX as a file server
Creating a Container
docker run -P -d --name {container name} nginx:latest
Accessing the container
docker exec -it {container name} bash
Editing nginx conf
server {
listen 80;
server_name your_domain_or_IP;
location / {
root /var/www/files;
autoindex on;
autoindex_exact_size off; # Optional: Show file sizes
autoindex_localtime on; # Optional: Show local time
}
}
This is basic config, should be configured to your needs
Restart the container
docker restart {container name}
Getting container port
docker port {container name}