FROM python:3.9-slim

# Set working directory
WORKDIR /app

# [cite_start]Install system dependencies needed for OpenCV and other libraries [cite: 2]
RUN apt-get update && apt-get install -y \
    libgl1-mesa-glx \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    libxrender-dev \
    libgomp1 \
    libgtk-3-0 \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first for better caching
COPY requirements.txt .

# [cite_start]Install Python dependencies [cite: 3]
RUN pip install --no-cache-dir -r requirements.txt

# Copy application files
COPY . .

# Set environment variables for optimization and fixing write permissions
ENV OMP_NUM_THREADS=2
ENV OPENBLAS_NUM_THREADS=2
ENV MKL_NUM_THREADS=2
ENV PYTHONUNBUFFERED=1
ENV MPLCONFIGDIR=/tmp/matplotlib
ENV YOLO_CONFIG_DIR=/tmp/yolo

# Expose port
EXPOSE 7860

# CMD gunicorn ... --threads 4 ... app:app // di ganti dengan
# PERBAIKAN DEFINITIF: Menggunakan 1 worker DAN 1 thread untuk stabilitas maksimum pada hardware terbatas.
# Ini memaksa server memproses satu request pada satu waktu, mencegah crash karena kehabisan memori/CPU.
CMD gunicorn --bind 0.0.0.0:7860 --workers 1 --threads 1 --worker-class gthread --timeout 300 --keep-alive 5 --max-requests 2000 --max-requests-jitter 50 app:app # baru perbaikan