# Use an official Python runtime as a parent image
FROM python:3.9-slim

# Set the working directory in the container
WORKDIR /app

# Install system dependencies required by librosa and soundfile
# ffmpeg is included for broader audio format compatibility
RUN apt-get update && apt-get install -y \
    libsndfile1 \
    ffmpeg \
    && rm -rf /var/lib/apt/lists/*

# Copy the requirements file into the container
COPY requirements.txt .

# Install any needed packages specified in requirements.txt
# Using --no-cache-dir reduces the image size
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application code into the container
COPY . .

# Make port 7860 available to the world outside this container
EXPOSE 7860

# Run app.py when the container launches
CMD ["python", "app.py"]