Dockerfile

# Dockerfile

# 1. Choose a base Python image
#    Using a specific version is recommended for reproducibility.
#    The '-slim' variant is smaller.
FROM python:3.12-slim

# 2. Set environment variables (optional but good practice)
ENV PYTHONDONTWRITEBYTECODE 1 
ENV PYTHONUNBUFFERED 1       

# Create a non-root user and group
ARG UID=1000
ARG GID=1000
RUN groupadd -g ${GID} --system appgroup && useradd -u ${UID} -g appgroup --system appuser


# 3. Set the working directory inside the container
WORKDIR /app

# Create data directory and set permissions
RUN mkdir /app/data && chown appuser:appgroup /app/data

# 4. Copy only the requirements file first to leverage Docker cache
COPY requirements.txt .

# 5. Install dependencies
#    --no-cache-dir makes the image smaller
#    --upgrade pip ensures we have the latest pip
RUN pip install --no-cache-dir --upgrade pip && \
    pip install --no-cache-dir -r requirements.txt

# 6. Copy the rest of the application code into the working directory
COPY . .

# 7. Expose the port the app runs on (uvicorn default is 8000)
EXPOSE 8000

# 8. Define the default command to run when the container starts
#    Use exec form for proper signal handling.
#    Do NOT use --reload in production.
CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "8000"]