Add production Dockerfile with all dependencies

Dockerfile

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+FROM python:3.10-slim
+
+# Set environment variables
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+ENV TRANSFORMERS_CACHE=/app/cache
+ENV HF_HOME=/app/cache
+ENV TORCH_HOME=/app/cache
+
+# Install system dependencies
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    build-essential \
+    git \
+    curl \
+    wget \
+    && rm -rf /var/lib/apt/lists/*
+
+# Create app directory
+WORKDIR /app
+
+# Create cache directory
+RUN mkdir -p /app/cache /app/uploads /app/models /app/logs
+
+# Copy requirements first for better caching
+COPY requirements.txt .
+
+# Install Python dependencies
+RUN pip install --no-cache-dir --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
+
+# Copy application code
+COPY . .
+
+# Create non-root user for security
+RUN useradd -m -u 1000 appuser && \
+    chown -R appuser:appuser /app
+USER appuser
+
+# Expose port
+EXPOSE 7860
+
+# Health check
+HEALTHCHECK --interval=30s --timeout=10s --start-period=5s --retries=3 \
+    CMD curl -f http://localhost:7860/health || exit 1
+
+# Run the application
+CMD ["python", "-m", "uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]