Dockerfile

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

# Set the working directory in the container
WORKDIR /app

# --- MAJOR CHANGE: Install ffmpeg for pydub (audio processing) ---
RUN apt-get update && apt-get install -y ffmpeg && rm -rf /var/lib/apt/lists/*

# Copy the requirements file into the container at /app
COPY requirements.txt .

# Install any needed packages specified in requirements.txt
RUN pip install --no-cache-dir -r requirements.txt

# Copy the rest of the application's code (including templates folder)
COPY . .

# Expose the port the app runs on
EXPOSE 7860

# Define environment variable
ENV PORT=7860

# Use thread-based workers to enable shared memory and concurrency
CMD ["gunicorn", "--workers", "1", "--threads", "8", "--worker-class", "gthread", "--bind", "0.0.0.0:7860", "--timeout", "480", "app:app"]