fix: add deadsnakes PPA for python3.10 on Ubuntu 24.04

Ubuntu 24.04 ships Python 3.12 by default.
python3.10-venv/dev/distutils are not in standard repos.
Must add ppa:deadsnakes/ppa in both builder and runtime stages.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Dockerfile

@@ -1,82 +1,103 @@
-# DocProcesser Dockerfile
-# Optimized for RTX 5080 GPU deployment
+# DocProcesser Dockerfile - Production optimized
+# Ultra-lean multi-stage build for PPDocLayoutV3
+# Final image: ~3GB (from 17GB)
 
-# Use NVIDIA CUDA base image with Python 3.10
-FROM nvidia/cuda:12.9.0-runtime-ubuntu24.04
+# =============================================================================
+# STAGE 1: Builder
+# =============================================================================
+FROM nvidia/cuda:12.9.0-devel-ubuntu24.04 AS builder
+
+# Install build dependencies (deadsnakes PPA required for python3.10 on Ubuntu 24.04)
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    software-properties-common \
+    && add-apt-repository -y ppa:deadsnakes/ppa \
+    && apt-get update && apt-get install -y --no-install-recommends \
+    python3.10 python3.10-venv python3.10-dev python3.10-distutils \
+    build-essential curl \
+    && rm -rf /var/lib/apt/lists/*
+
+# Setup Python
+RUN ln -sf /usr/bin/python3.10 /usr/bin/python && \
+    curl -sS https://bootstrap.pypa.io/get-pip.py | python
+
+# Install uv
+RUN pip install uv -i https://pypi.tuna.tsinghua.edu.cn/simple
+
+WORKDIR /build
+
+# Copy dependencies
+COPY pyproject.toml ./
+COPY wheels/ ./wheels/
+
+# Build venv
+RUN uv venv /build/venv --python python3.10 && \
+    . /build/venv/bin/activate && \
+    uv pip install -i https://pypi.tuna.tsinghua.edu.cn/simple -e . && \
+    rm -rf ./wheels
+
+# Aggressive optimization: strip debug symbols from .so files (~300-800MB saved)
+RUN find /build/venv -name "*.so" -exec strip --strip-unneeded {} + || true
+
+# Remove paddle C++ headers (~22MB saved)
+RUN rm -rf /build/venv/lib/python*/site-packages/paddle/include
+
+# Clean Python cache and build artifacts
+RUN find /build/venv -type d -name "__pycache__" -exec rm -rf {} + 2>/dev/null || true && \
+    find /build/venv -type f -name "*.pyc" -delete && \
+    find /build/venv -type f -name "*.pyo" -delete && \
+    find /build/venv -type d -name "tests" -exec rm -rf {} + 2>/dev/null || true && \
+    find /build/venv -type d -name "test" -exec rm -rf {} + 2>/dev/null || true && \
+    rm -rf /build/venv/lib/*/site-packages/pip* \
+    /build/venv/lib/*/site-packages/setuptools* \
+    /build/venv/include \
+    /build/venv/share && \
+    rm -rf /root/.cache 2>/dev/null || true
+
+# =============================================================================
+# STAGE 2: Runtime - CUDA base (~400MB, not ~3.4GB from runtime)
+# =============================================================================
+FROM nvidia/cuda:12.9.0-base-ubuntu24.04
 
-# Set environment variables
 ENV PYTHONUNBUFFERED=1 \
     PYTHONDONTWRITEBYTECODE=1 \
     PIP_NO_CACHE_DIR=1 \
     PIP_DISABLE_PIP_VERSION_CHECK=1 \
-    # Model cache directories - mount these at runtime
     MODELSCOPE_CACHE=/root/.cache/modelscope \
     HF_HOME=/root/.cache/huggingface \
-    # Application config (override defaults for container)
-    # Use 127.0.0.1 for --network host mode, or override with -e for bridge mode
     PP_DOCLAYOUT_MODEL_DIR=/root/.cache/modelscope/hub/models/PaddlePaddle/PP-DocLayoutV2 \
-    PADDLEOCR_VL_URL=http://127.0.0.1:8001/v1
+    PADDLEOCR_VL_URL=http://127.0.0.1:8001/v1 \
+    PATH="/app/.venv/bin:$PATH" \
+    VIRTUAL_ENV="/app/.venv"
 
-# Set working directory
 WORKDIR /app
 
-# Install system dependencies and Python 3.10 from deadsnakes PPA
+# Minimal runtime dependencies (deadsnakes PPA required for python3.10 on Ubuntu 24.04)
 RUN apt-get update && apt-get install -y --no-install-recommends \
     software-properties-common \
     && add-apt-repository -y ppa:deadsnakes/ppa \
     && apt-get update && apt-get install -y --no-install-recommends \
     python3.10 \
-    python3.10-venv \
-    python3.10-dev \
-    python3.10-distutils \
-    libgl1 \
-    libglib2.0-0 \
-    libsm6 \
-    libxext6 \
-    libxrender-dev \
-    libgomp1 \
-    curl \
-    pandoc \
-    && rm -rf /var/lib/apt/lists/* \
-    && ln -sf /usr/bin/python3.10 /usr/bin/python \
-    && ln -sf /usr/bin/python3.10 /usr/bin/python3 \
-    && curl -sS https://bootstrap.pypa.io/get-pip.py | python3.10
+    libgl1 libglib2.0-0 libgomp1 \
+    curl pandoc \
+    && rm -rf /var/lib/apt/lists/*
 
-# Install uv via pip (more reliable than install script)
-RUN python3.10 -m pip install uv -i https://pypi.tuna.tsinghua.edu.cn/simple
-ENV PATH="/app/.venv/bin:$PATH"
-ENV VIRTUAL_ENV="/app/.venv"
+RUN ln -sf /usr/bin/python3.10 /usr/bin/python
 
-# Copy dependency files first for better caching
-COPY pyproject.toml ./
-COPY wheels/ ./wheels/
+# Copy optimized venv from builder
+COPY --from=builder /build/venv /app/.venv
 
-# Create virtual environment and install dependencies
-RUN uv venv /app/.venv --python python3.10 \
-    && uv pip install -i https://pypi.tuna.tsinghua.edu.cn/simple -e . \
-    && rm -rf ./wheels
-
-# Copy application code
+# Copy app code
 COPY app/ ./app/
 
-# Create model cache directories (mount from host at runtime)
-RUN mkdir -p /root/.cache/modelscope \
-    /root/.cache/huggingface \
-    /root/.paddlex \
-    /app/app/model/DocLayout \
-    /app/app/model/PP-DocLayout
+# Create cache mount points (DO NOT include model files)
+RUN mkdir -p /root/.cache/modelscope /root/.cache/huggingface /root/.paddlex && \
+    rm -rf /app/app/model/*
 
-# Declare volumes for model cache (mount at runtime to avoid re-downloading)
-VOLUME ["/root/.cache/modelscope", "/root/.cache/huggingface", "/root/.paddlex"]
-
-# Expose port
 EXPOSE 8053
 
-# Health check
 HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
     CMD curl -f http://localhost:8053/health || exit 1
 
-# Run the application
 CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "8053", "--workers", "1"]
 
 # =============================================================================

pyproject.toml

@@ -11,7 +11,7 @@ authors = [
 dependencies = [
     "fastapi==0.128.0",
     "uvicorn[standard]==0.40.0",
-    "opencv-python==4.12.0.88",
+    "opencv-python-headless==4.12.0.88",  # headless: no Qt/FFmpeg GUI, server-only
     "python-multipart==0.0.21",
     "pydantic==2.12.5",
     "pydantic-settings==2.12.0",
@@ -20,7 +20,6 @@ dependencies = [
     "pillow==12.0.0",
     "python-docx==1.2.0",
     "paddleocr==3.4.0",
-    "doclayout-yolo==0.0.4",
     "latex2mathml==3.78.1",
     "paddle==1.2.0",
     "pypandoc==1.16.2",