Nginx in docker with templates

docker-compose.yaml

version: "3"

services:
  nginx:
    image: nginx:1.21.6-alpine
    environment:
      - NGINX_ORDER_HOST=sample.com
      - NGINX_ORDER_BACKEND=http://sample:8080
    volumes:
      - "./nginx/templates:/etc/nginx/templates:ro"
    ports:
      - 80:80
      - 443:443

# Sample of the template file.
# the filename must be end of .conf.template
#server {
#    listen 80;
#    server_name ${NGINX_ORDER_HOST};
#    location / {
#        proxy_pass              ${NGINX_ORDER_BACKEND};
#        proxy_set_header        X-Real-IP                    $remote_addr;
#        proxy_redirect          off;
#        proxy_http_version      1.1;
#        proxy_buffering         off;
#    }
#}