Update Dockerfile

Dockerfile

@@ -4,7 +4,7 @@ FROM python:3.10-slim
 # Set working directory
 WORKDIR /app
 
-# Install system dependencies (for PyTorch and git, sometimes needed)
+# Install system dependencies (for PyTorch and git)
 RUN apt-get update && apt-get install -y git && rm -rf /var/lib/apt/lists/*
 
 # Copy requirements and install
@@ -14,15 +14,14 @@ RUN pip install --no-cache-dir -r requirements.txt
 # Copy application code
 COPY . .
 
-# ✅ Hugging Face cache directory (writable in Spaces)
-ENV HF_HOME=/app/cache
-RUN mkdir -p /app/cache
+# ✅ Hugging Face cache directory (use /tmp, writable in Spaces)
+ENV HF_HOME=/tmp
 
-# Pre-download model so container starts faster
+# Pre-download model into /tmp to avoid cold start
 RUN python -c "from transformers import AutoTokenizer, AutoModelForCausalLM; \
     model_id='rabiyulfahim/qa_python_gpt2'; \
-    AutoTokenizer.from_pretrained(model_id, cache_dir='/app/cache'); \
-    AutoModelForCausalLM.from_pretrained(model_id, cache_dir='/app/cache')"
+    AutoTokenizer.from_pretrained(model_id, cache_dir='/tmp'); \
+    AutoModelForCausalLM.from_pretrained(model_id, cache_dir='/tmp')"
 
 # Expose FastAPI port
 EXPOSE 8000