Update Dockerfile

Dockerfile

@@ -1,18 +1,20 @@
-# Stage 1: Builder
+# Stage 1: Builder for dependencies
 FROM python:3.9-slim as builder
 
 WORKDIR /app
-COPY requirements.txt .
 
+# Install build 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
+COPY requirements.txt .
 RUN pip install --user --no-cache-dir -r requirements.txt
 
-# Stage 2: Runtime
+# Stage 2: Runtime image
 FROM python:3.9-slim
 
 WORKDIR /app
@@ -23,14 +25,14 @@ RUN apt-get update && \
     ffmpeg \
     && rm -rf /var/lib/apt/lists/*
 
-# Copy Python dependencies
+# Copy Python dependencies from builder
 COPY --from=builder /root/.local /root/.local
 COPY --from=builder /app/requirements.txt .
 
-# Application files
+# Copy application files
 COPY app.py audio_generator.py ./
 
-# Create output directory with correct permissions
+# Create and configure output directory
 RUN mkdir -p /app/tts_outputs && \
     chmod 777 /app/tts_outputs