Update Dockerfile with proper caching and build dependencies

Dockerfile

@@ -1,18 +1,36 @@
+# Use Python 3.11 slim image
 FROM python:3.11-slim
 
 # Set working directory
-WORKDIR /app
+WORKDIR /code
+
+# Set environment variables
+ENV PORT=7860
+ENV PYTHONPATH=/code
+ENV TRANSFORMERS_CACHE=/code/.cache/transformers
+
+# Install system dependencies
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends \
+    build-essential \
+    git \
+    && rm -rf /var/lib/apt/lists/*
 
 # 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 the rest of the application
 COPY . .
 
-# Hugging Face Spaces uses port 7860
-ENV PORT=7860
+# Create cache directory for transformers
+RUN mkdir -p /code/.cache/transformers
+
+# Make port 7860 available
+EXPOSE 7860
 
 # Run the FastAPI server
-CMD ["bash", "-c", "uvicorn server:app --host 0.0.0.0 --port ${PORT}"]
+CMD ["bash", "-c", "uvicorn server:app --host 0.0.0.0 --port ${PORT} --workers 1"]