Update Dockerfile

Dockerfile

@@ -7,6 +7,8 @@ WORKDIR /app
 ENV PYTHONDONTWRITEBYTECODE=1
 ENV PYTHONUNBUFFERED=1
 ENV MPLCONFIGDIR=/tmp/matplotlib-cache
+ENV PIP_DEFAULT_TIMEOUT=100
+ENV PIP_NO_CACHE_DIR=1
 
 # Create cache directories
 RUN mkdir -p /tmp/voices /tmp/output /tmp/matplotlib-cache && \
@@ -19,11 +21,14 @@ RUN apt-get update && apt-get install -y \
     libsndfile1 \
     && rm -rf /var/lib/apt/lists/*
 
+# Upgrade pip first
+RUN pip install --upgrade pip
+
 # Copy requirements first for better caching
 COPY requirements.txt .
 
-# Install Python dependencies
-RUN pip install --no-cache-dir -r requirements.txt
+# Install Python dependencies with timeout and retry
+RUN pip install --no-cache-dir --timeout=100 --retries=5 -r requirements.txt
 
 # Copy application code
 COPY app.py .