Update project configuration and structure with Docker support and environment variable adjustments

- Updated .env.example to reflect new LLM configuration with Aliyun's API.
- Enhanced .gitignore to include additional files and directories for better exclusion of sensitive and build artifacts.
- Added docker-compose.yml for streamlined deployment of backend and frontend services.
- Introduced Dockerfiles for both backend and frontend to facilitate containerized builds.
- Created README.md to provide comprehensive project documentation and setup instructions.
- Established nginx configuration for frontend to support API proxying and static file serving.

backend/Dockerfile

@@ -0,0 +1,59 @@
+# MiroFish Backend Dockerfile
+# Multi-stage build for smaller image size
+
+# ============= Build Stage =============
+FROM python:3.11-slim AS builder
+
+WORKDIR /app
+
+# 安装构建依赖
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+# 复制依赖文件
+COPY requirements.txt .
+
+# 创建虚拟环境并安装依赖
+RUN python -m venv /opt/venv
+ENV PATH="/opt/venv/bin:$PATH"
+
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
+
+# ============= Production Stage =============
+FROM python:3.11-slim
+
+WORKDIR /app
+
+# 安装运行时依赖
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# 从 builder 复制虚拟环境
+COPY --from=builder /opt/venv /opt/venv
+ENV PATH="/opt/venv/bin:$PATH"
+
+# 复制应用代码
+COPY app/ ./app/
+COPY scripts/ ./scripts/
+COPY run.py .
+
+# 创建上传目录
+RUN mkdir -p uploads/simulations uploads/reports
+
+# 设置环境变量
+ENV PYTHONUNBUFFERED=1
+ENV FLASK_HOST=0.0.0.0
+ENV FLASK_PORT=5001
+
+# 暴露端口
+EXPOSE 5001
+
+# 健康检查
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:5001/health || exit 1
+
+# 启动命令
+CMD ["python", "run.py"]