Dockerfile

# ==========================================
# Stage 1: Build the React + Vite Frontend
# ==========================================
FROM node:20-slim AS frontend-builder
WORKDIR /app/frontend

# Copy frontend source files
COPY frontend/package*.json ./
RUN npm ci

COPY frontend/ ./
RUN npm run build

# ==========================================
# Stage 2: Build the FastAPI + PyTorch Backend
# ==========================================
FROM python:3.10-slim

# Install system dependencies (libsndfile1 is required by soundfile, espeak for pyttsx3 Linux speech)
RUN apt-get update && apt-get install -y --no-install-recommends \
    libsndfile1 \
    espeak \
    ffmpeg \
    git \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

# Create a non-root user with UID 1000 (Hugging Face Spaces requirement)
RUN useradd -m -u 1000 user
ENV HOME=/home/user \
    PATH=/home/user/.local/bin:$PATH \
    PYTHONUNBUFFERED=1

# Pre-create writable directories for audio caches and temp audio files
RUN mkdir -p /app/static/temp && \
    mkdir -p /home/user/.cache/huggingface && \
    chown -R user:user /app /home/user

# Switch to the non-root user
USER user

# Install CPU-only PyTorch first to keep the container extremely lightweight (~1.5GB instead of 5GB)
RUN pip3 install --no-cache-dir --user torch torchaudio --index-url https://download.pytorch.org/whl/cpu

# Copy backend requirements and install dependencies
COPY --chown=user:user requirements.txt .
RUN pip3 install --no-cache-dir --user -r requirements.txt

# Install VibeVoice package with --no-deps to prevent compiling unused/heavy packages (like aiortc and av)
RUN pip3 install --no-cache-dir --user --no-deps git+https://github.com/shijincai/VibeVoice.git

# Copy FastAPI backend code and assets
COPY --chown=user:user app.py .
COPY --chown=user:user static/ static/

# Copy the built React static bundles from Stage 1
COPY --chown=user:user --from=frontend-builder /app/frontend/dist ./frontend/dist

# Expose Hugging Face Space port
EXPOSE 7860
ENV PORT=7860

# Start the FastAPI server dynamically binding to port 7860
CMD ["python3", "app.py"]