Fix HuggingFace Spaces cache permission error

- Set TRANSFORMERS_CACHE, HF_HOME, and HUGGINGFACE_HUB_CACHE to /tmp directories
- Create cache directories with proper permissions in Dockerfile
- Configure environment variables in app.py for HF Spaces
- Use CPU for HF Spaces free tier

Dockerfile

@@ -8,6 +8,15 @@ RUN apt-get update && apt-get install -y \
 
 WORKDIR /app
 
+# Set environment variables for Hugging Face cache
+ENV TRANSFORMERS_CACHE=/tmp/transformers_cache
+ENV HF_HOME=/tmp/hf_home
+ENV HUGGINGFACE_HUB_CACHE=/tmp/huggingface_hub
+
+# Create cache directories with proper permissions
+RUN mkdir -p /tmp/transformers_cache /tmp/hf_home /tmp/huggingface_hub && \
+    chmod -R 777 /tmp/transformers_cache /tmp/hf_home /tmp/huggingface_hub
+
 # Copy and install Python requirements
 COPY requirements.txt .
 RUN pip install --no-cache-dir -r requirements.txt

app.py

@@ -24,9 +24,14 @@ if os.getenv("SPACE_ID"):
     # Running on HuggingFace Spaces
     logger.info(f"Running on HuggingFace Spaces: {os.getenv('SPACE_ID')}")
     
+    # Set cache directories for HuggingFace Spaces
+    os.environ["TRANSFORMERS_CACHE"] = "/tmp/transformers_cache"
+    os.environ["HF_HOME"] = "/tmp/hf_home"
+    os.environ["HUGGINGFACE_HUB_CACHE"] = "/tmp/huggingface_hub"
+    
     # Set production environment variables
     os.environ["ENVIRONMENT"] = "production"
-    os.environ["MODEL_DEVICE"] = os.getenv("MODEL_DEVICE", "cuda")
+    os.environ["MODEL_DEVICE"] = os.getenv("MODEL_DEVICE", "cpu")  # Use CPU for HF Spaces free tier
     
     # Enable CORS for the Space URL
     space_host = os.getenv("SPACE_HOST", "")