优化注册功能

Dockerfile.low-mem

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+# -*- coding: utf-8 -*-
+# 小内存优化版 Dockerfile（适用于 512MB-1GB 内存的 Linux 机器）
+FROM python:3-slim
+
+# 设置工作目录
+WORKDIR /app
+
+# 设置环境变量（优化内存使用）
+ENV PYTHONUNBUFFERED=1 \
+    PYTHONDONTWRITEBYTECODE=1 \
+    FLASK_APP=web_app.py \
+    FLASK_ENV=production \
+    PYTHONHASHSEED=0 \
+    MALLOC_ARENA_MAX=2
+
+# 安装系统依赖（最小化安装）
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    tesseract-ocr \
+    tesseract-ocr-chi-sim \
+    tesseract-ocr-eng \
+    && rm -rf /var/lib/apt/lists/* \
+    && apt-get clean
+
+# 复制requirements文件
+COPY requirements.txt .
+
+# 创建最小化的 requirements.txt（移除GUI相关依赖）
+RUN echo "scikit-learn>=1.3.0" > requirements-minimal.txt && \
+    echo "pandas>=2.0.0" >> requirements-minimal.txt && \
+    echo "numpy>=1.24.0" >> requirements-minimal.txt && \
+    echo "joblib>=1.3.0" >> requirements-minimal.txt && \
+    echo "requests>=2.31.0" >> requirements-minimal.txt && \
+    echo "python-dotenv>=1.0.0" >> requirements-minimal.txt && \
+    echo "python-dateutil>=2.8.0" >> requirements-minimal.txt && \
+    echo "Pillow>=10.0.0" >> requirements-minimal.txt && \
+    echo "pytesseract>=0.3.10" >> requirements-minimal.txt && \
+    echo "opencv-python-headless>=4.8.0" >> requirements-minimal.txt && \
+    echo "Flask>=3.0.0" >> requirements-minimal.txt && \
+    echo "Werkzeug>=3.0.0" >> requirements-minimal.txt && \
+    echo "gunicorn" >> requirements-minimal.txt
+
+# 安装Python依赖（使用最小化依赖，opencv使用headless版本）
+RUN pip install --no-cache-dir -r requirements-minimal.txt
+
+# 复制应用代码
+COPY . .
+
+# 创建必要的目录
+RUN mkdir -p templates static/css static/js logs data models
+
+# 设置权限
+RUN chmod +x start_web.py
+
+# 暴露端口
+EXPOSE 5000
+
+# 健康检查（不使用 requests，直接用 Python）
+HEALTHCHECK --interval=30s --timeout=10s --start-period=10s --retries=3 \
+    CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:5000/health').read()" || exit 1
+
+# 使用gunicorn启动应用（小内存配置：单worker，减少内存占用）
+CMD ["gunicorn", "--bind", "0.0.0.0:5000", "--workers", "1", "--threads", "2", "--timeout", "120", "--worker-class", "sync", "--max-requests", "1000", "--max-requests-jitter", "100", "--preload", "--access-logfile", "-", "--error-logfile", "-", "web_app:app"]
+