dockerfile

FROM python:3.14-slim

WORKDIR /app

# Install system dependencies for potential build requirements
RUN apt-get update && apt-get install -y --no-install-recommends \
    gcc \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

COPY requirements.lock.txt .
RUN pip install --no-cache-dir --require-hashes -r requirements.lock.txt

# Copy the application code
COPY app/ ./app/
COPY config.py .
COPY run.py .

# Create the database directory for SQLite fallback
RUN mkdir -p db

EXPOSE 5000

ENV BASE_DOMAIN=short.example.com
ENV EXPIRY_HOURS=24
ENV SHORT_CODE_LENGTH=6
ENV DEFAULT_QR_COLOR="black"
ENV DEFAULT_QR_BACKGROUND="white"

# Use the entry point with gunicorn
CMD ["gunicorn", "--bind", "0.0.0.0:5000", "app:create_app()", "--workers", "4", "--threads", "2", "--preload", "--access-logfile", "-", "--error-logfile", "-"]