添加docker-compose.dev

backend/Dockerfile

@@ -0,0 +1,21 @@
+# syntax=docker/dockerfile:1
+FROM python:3.12.2
+
+WORKDIR /app
+
+# 安装系统依赖
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+    build-essential \
+    default-libmysqlclient-dev \
+    pkg-config \
+    && rm -rf /var/lib/apt/lists/*
+
+
+COPY requirements.txt .
+RUN pip install -r requirements.txt
+
+COPY . .
+
+# 默认命令，开发和生产通过 docker-compose 覆盖
+CMD ["python", "manage.py", "runserver", "0.0.0.0:8000"]