我试图用我项目中的.env文件中的一些变量填充这个nginx.conf.template文件。My .env和我的docker-compose. yml位于同一个目录中。
下面是我的nginx.conf.template：

events {
  worker_connections 1024;
}

http {
  server {
    listen 80;
    server_name $DOCKER_DOMAIN_NAMES;

    location /.well-known/acme-challenge/ {
      root /var/www/certbot;
    }

    location / {
      return 301 https://$host$request_uri;
    }
  }

  server {
    listen 443 ssl;
    server_name $events {
  worker_connections 1024;
}

http {
  server {
    listen 80;
    server_name $DOCKER_DOMAIN_NAMES;

    location /.well-known/acme-challenge/ {
      root /var/www/certbot;
    }

    location / {
      return 301 https://$host$request_uri;
    }
  }

  server {
    listen 443 ssl;
    server_name $DOCKER_SERVER_NAMES;

    ssl_certificate /etc/letsencrypt/live/$DOCKER_DOMAIN_PATH/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/$DOCKER_DOMAIN_PATH/privkey.pem;
    ssl_trusted_certificate /etc/letsencrypt/live/$DOCKER_DOMAIN_PATH}/chain.pem;
    include /etc/letsencrypt/options-ssl-nginx.conf;
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;

    location / {
      proxy_pass http://app:3000;
      proxy_set_header Host $host;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-Forwarded-Proto $scheme;
    }
  }
};

    ssl_certificate /etc/letsencrypt/live/$DOCKER_DOMAIN_PATH/fullchain.pem;
    ssl_certificate_key /etc/letsencrypt/live/$DOCKER_DOMAIN_PATH/privkey.pem;
    ssl_trusted_certificate /etc/letsencrypt/live/$DOCKER_DOMAIN_PATH}/chain.pem;
    include /etc/letsencrypt/options-ssl-nginx.conf;
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem;

    location / {
      proxy_pass http://app:3000;
      proxy_set_header Host $host;
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header X-Forwarded-Proto $scheme;
    }
  }
}

我检查了容器docker exec -it nginx_container sh，我看到像$DOCKER_SERVER_NAMES这样的变量名仍然存在，而不是字符串值。
这是我的docker-composer.yml

nginx:
    build: ./nginx
    env_file:
      - .env
    ports:
      - "80:80"
      - "443:443"
    environment:
      - DOMAIN_NAMES=${DOCKER_DOMAIN_NAMES}
      - CERTIFICATION_EMAIL=${DOCKER_CERTIFICATION_EMAIL}
      - DOCKER_DOMAIN_PATH=${DOCKER_DOMAIN_PATH}
    volumes:
      - ./ssl-dhparams.pem:/etc/letsencrypt/ssl-dhparams.pem
      - ./nginx/nginx.conf.template:/etc/nginx/nginx.conf.template:ro
      - ./nginx/options-ssl-nginx.conf:/etc/letsencrypt/options-ssl-nginx.conf:ro
      - ./certbot/conf:/etc/letsencrypt
      - ./certbot/www:/var/www/certbot
    depends_on:
      - app

我的变量似乎在其他部分工作，但由于某种原因，我不能让它们在confg.template文件中工作。
我的项目结构：

project/
├── Dockerfile
├── docker-compose.yml
├── .env
└── nginx/
    ├── Dockerfile
    ├── nginx.conf.template
    └── myshellscript.sh

例如，myshellscript.sh将有一些/etc/letsencrypt/live/$DOCKER_DOMAIN_PATH/fullchain.pem，它在容器中出现，正如预期的/etc/letsencrypt/live/mywebsite.com/fullchain.pem，所以我不确定这些其他变量有什么问题。如何在模板文件中使其动态化？