Fix: use writable cache dir for Hugging Face model loading

Dockerfile

@@ -14,14 +14,14 @@ RUN pip install --no-cache-dir --upgrade pip
 RUN pip install --no-cache-dir -r requirements.txt
 RUN pip install --no-cache-dir torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cpu
 
-# Set environment variables for AI models
-ENV TRANSFORMERS_CACHE=/tmp/model_cache
-ENV HF_HOME=/tmp/model_cache
+# ✅ Set environment variables to a writable path
+ENV TRANSFORMERS_CACHE=/app/cache
+ENV HF_HOME=/app/cache
 ENV TOKENIZERS_PARALLELISM=false
 ENV OMP_NUM_THREADS=1
 
-# Create cache directory
-RUN mkdir -p /tmp/model_cache
+# ✅ Create model cache directory inside app folder
+RUN mkdir -p /app/cache
 
 # Copy application
 COPY . .