Update Dockerfile

Dockerfile

@@ -2,19 +2,30 @@
 FROM node:20-alpine AS frontend
 WORKDIR /ui
 
-# Copy package files and install deps
 COPY frontend/package*.json ./
 RUN npm ci --silent || npm install --silent
 
-# Copy frontend source and build
 COPY frontend ./
 RUN npm run build
 
 # --- Backend Stage (FastAPI + Python) ---
-FROM python:3.11-slim
+FROM python:3.11-bullseye  # Use full Debian, not slim
 WORKDIR /app
 
-# Install Python dependencies
+# Install system dependencies needed for Python packages
+RUN apt-get update && apt-get install -y \
+    build-essential \
+    git \
+    ffmpeg \
+    libsm6 \
+    libxext6 \
+    libsndfile1 \
+    && rm -rf /var/lib/apt/lists/*
+
+# Upgrade pip, setuptools, wheel
+RUN python -m pip install --upgrade pip setuptools wheel
+
+# Copy and install Python dependencies
 COPY requirements.txt ./
 RUN pip install --no-cache-dir -r requirements.txt
 
@@ -22,11 +33,11 @@ RUN pip install --no-cache-dir -r requirements.txt
 COPY backend ./backend
 COPY app.py Procfile .env.example ./
 
-# Copy built frontend from frontend stage
+# Copy built frontend
 COPY --from=frontend /ui/dist ./frontend_dist
 
-# Bust cache so Hugging Face doesn’t reuse stale Node layers
+# Bust cache
 ARG CACHE_BUST=1
 
 EXPOSE 7860
-CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]