Add GPU support with Docker enhancements

- Introduced a `Dockerfile.gpu` for GPU-enabled backend setup.
- Added `docker-compose.gpu.yml` to utilize GPU resources via NVIDIA.
- Fixed Nginx configuration for GPU backend port changes.

backend/Dockerfile.gpu

@@ -0,0 +1,15 @@
+FROM nvidia/cuda:12.6.0-cudnn-runtime-ubuntu24.04
+
+RUN apt update && \
+    apt install -y ffmpeg python3-pip && \
+    apt clean all
+
+# 设置 Hugging Face 镜像源环境变量
+ENV HF_ENDPOINT=https://hf-mirror.com
+
+WORKDIR /app
+COPY ./backend /app
+RUN pip install --no-cache-dir -i https://pypi.mirrors.ustc.edu.cn/simple -r requirements.txt --break-system-packages
+RUN pip install --no-cache-dir -i https://pypi.mirrors.ustc.edu.cn/simple transformers[torch]>=4.23 --break-system-packages
+
+CMD ["python3", "main.py"]

docker-compose.gpu.yml

@@ -0,0 +1,44 @@
+
+services:
+  backend:
+    container_name: bilinote-backend
+    build:
+      context: .
+      dockerfile: backend/Dockerfile.gpu
+    env_file:
+      - .env
+    environment:
+      - BACKEND_PORT=${BACKEND_PORT}
+      - BACKEND_HOST=${BACKEND_HOST}
+    volumes:
+      - ./backend:/app
+    expose:
+      - "${BACKEND_PORT}"  # 不再对外暴露，用于 nginx 内部通信
+    deploy:
+      resources:
+        reservations:
+          devices:
+            - driver: "nvidia"
+              count: "all"
+              capabilities: ["gpu"]
+
+  frontend:
+    container_name: bilinote-frontend
+    build:
+      context: .
+      dockerfile: BillNote_frontend/Dockerfile
+    env_file:
+      - .env
+    expose:
+      - "80"  # 不暴露给宿主机，只供 nginx 访问
+
+  nginx:
+    container_name: bilinote-nginx
+    image: nginx:1.25-alpine
+    ports:
+      - "${APP_PORT}:80"
+    volumes:
+      - ./nginx/default.conf:/etc/nginx/conf.d/default.conf
+    depends_on:
+      - backend
+      - frontend

nginx/default.conf

@@ -8,13 +8,13 @@ server {
 
   # 所有 /api 请求代理给 backend 容器
   location /api/ {
-    proxy_pass http://backend:8000;
+    proxy_pass http://backend:8483;
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;
   }
     
    location /static/ {
-    proxy_pass http://backend:8000/static/;
+    proxy_pass http://backend:8483/static/;
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;