Dockerfile

# Use a newer slim Python image
FROM docker.io/library/python:3.11-slim

# Use a newer slim Python image
FROM docker.io/library/python:3.11-slim

# Install system dependencies, including build tools and ffmpeg
RUN apt-get update && apt-get install -y sox ffmpeg build-essential

# Use Python 3.10 (best compatibility with NeMo 1.20.0)
FROM python:3.10-slim

# Set working directory
WORKDIR /app

# Install system dependencies
# build-essential for compiling youtokentome, ffmpeg/libsndfile for audio
RUN apt-get update && apt-get install -y \
    build-essential \
    ffmpeg \
    libsndfile1 \
    sox \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first
COPY requirements.txt .

# Install Cython FIRST (critical for youtokentome)
RUN pip install --no-cache-dir Cython

# Install torch before NeMo
RUN pip install --no-cache-dir torch==1.13.1 torchaudio==0.13.1

# Install pytorch-lightning with compatible version
RUN pip install --no-cache-dir "pytorch-lightning==1.9.4"

# Install youtokentome (now it can build with Cython)
RUN pip install --no-cache-dir youtokentome

# Install remaining requirements
RUN pip install --no-cache-dir -r requirements.txt

# Copy app files
COPY backend.py app.py ./

# Expose port (HFS expects 7860 for Gradio)
EXPOSE 7860

# Run Gradio app
CMD ["python", "app.py"]