Update Dockerfile

Dockerfile

@@ -1,54 +1,56 @@
-# Stage 1: Builder for dependencies
+# Stage 1: Install all dependencies
 FROM python:3.9-slim as builder
 
 WORKDIR /app
 
-# Install build dependencies
+# 1. Install system dependencies
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
     gcc \
     python3-dev \
     && rm -rf /var/lib/apt/lists/*
 
-# Copy and install requirements
+# 2. Create and activate virtual environment
+RUN python -m venv /opt/venv
+ENV PATH="/opt/venv/bin:$PATH"
+
+# 3. Install Python packages
 COPY requirements.txt .
-RUN pip install --user --no-cache-dir -r requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
 
-# Stage 2: Runtime image
+# Stage 2: Create lightweight runtime image
 FROM python:3.9-slim
 
 WORKDIR /app
 
-# Install runtime dependencies
+# 1. Install runtime dependencies
 RUN apt-get update && \
     apt-get install -y --no-install-recommends \
     ffmpeg \
     && rm -rf /var/lib/apt/lists/*
 
-# Copy Python dependencies from builder
-COPY --from=builder /root/.local /root/.local
-COPY --from=builder /app/requirements.txt .
+# 2. Copy virtual environment from builder
+COPY --from=builder /opt/venv /opt/venv
+ENV PATH="/opt/venv/bin:$PATH"
 
-# Copy application files
+# 3. Copy application files
 COPY app.py audio_generator.py ./
 
-# Create and configure output directory
+# 4. Create output directory
 RUN mkdir -p /app/tts_outputs && \
     chmod 777 /app/tts_outputs
 
-# Environment configuration
-ENV PATH=/root/.local/bin:$PATH \
-    PYTHONUNBUFFERED=1 \
-    PYTHONPATH=/app \
+# 5. Environment configuration
+ENV PYTHONUNBUFFERED=1 \
     PORT=7860
 
-# Healthcheck
+# 6. Healthcheck
 HEALTHCHECK --interval=30s --timeout=10s \
     CMD curl -f http://localhost:${PORT}/health || exit 1
 
 EXPOSE ${PORT}
 
-# Run as non-root user
+# 7. Run as non-root user
 RUN useradd -m ttsuser && \
     chown -R ttsuser /app
 USER ttsuser