added sub directory and changed docker

Dockerfile

@@ -7,6 +7,7 @@ COPY . /app
 
 # Install dependencies
 RUN pip install --no-cache-dir -r requirements.txt
+RUN mkdir -p /app/.cache && chmod -R 777 /app/.cache
 
 # Expose the port your FastAPI app runs on (e.g. 7860)
 EXPOSE 7860

app.py

@@ -19,7 +19,10 @@ from langchain_core.runnables import RunnablePassthrough
 
 # FastAPI initialization
 app = FastAPI(title="RAG API", description="Simple API for RAG-based question answering")
-os.environ["HF_DATASETS_CACHE"] = "/tmp/.hf_datasets_cache"
+os.environ["HF_HOME"] = "./.cache"
+os.environ["HF_DATASETS_CACHE"] = "./.cache/datasets"
+os.environ["TRANSFORMERS_CACHE"] = "./.cache/transformers"
+
 
 # Global variables
 persist_directory = "./chroma_db"