.dockerfile

FROM python:3.10-slim

# 1) system deps + fetch .deb  
RUN apt-get update && apt-get install -y --no-install-recommends \
      build-essential wget python3-dev \
 && wget https://prdownloads.sourceforge.net/ta-lib/ta-lib_0.6.4_amd64.deb \
 && dpkg -i ta-lib_0.6.4_amd64.deb \
 && rm ta-lib_0.6.4_amd64.deb \
 && rm -rf /var/lib/apt/lists/*

# 2) install your Python deps  
COPY requirements.txt /app/requirements.txt
WORKDIR /app
RUN pip install --no-cache-dir -r requirements.txt

COPY . /app
CMD ["python", "app.py"]