优化Docker配置：支持通过环境变量自定义宿主机与容器端口映射

CONFIG.md

@@ -101,3 +101,5 @@ BingPaper 支持通过配置文件（YAML）和环境变量进行配置。
 - `BINGPAPER_STORAGE_TYPE=s3`
 - `BINGPAPER_STORAGE_S3_BUCKET=my-images`
 - `BINGPAPER_ADMIN_PASSWORD_BCRYPT="$2a$10$..."`
+- `HOST_PORT=8080` (仅限 Docker Compose 部署，控制宿主机映射到外部的端口)
+- `BINGPAPER_SERVER_PORT=8080` (控制应用监听端口及容器内部端口)

docker-compose.yml

@@ -8,12 +8,12 @@ services:
     container_name: bingpaper
     restart: always
     ports:
-      - "8080:8080"
+      - "${HOST_PORT:-8080}:${BINGPAPER_SERVER_PORT:-8080}"
     volumes:
       - ./data:/app/data
     environment:
       - TZ=Asia/Shanghai
-      - BINGPAPER_SERVER_PORT=8080
+      - BINGPAPER_SERVER_PORT=${BINGPAPER_SERVER_PORT:-8080}
       - BINGPAPER_LOG_LEVEL=info
       - BINGPAPER_API_MODE=local
       - BINGPAPER_CRON_ENABLED=true