fix: Add writable permissions for ChromaDB directory

Dockerfile

@@ -10,14 +10,15 @@ COPY ./requirements.txt /code/requirements.txt
 # Install any needed packages specified in requirements.txt
 RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
 
-# --- START: FINAL PERMISSION FIX ---
-# Create a writable cache directory by changing its permissions.
-# This allows any user (including the one running the app) to write to it.
+# --- START: FINAL PERMISSION FIXES ---
+# Create a writable directory for model caches
 RUN mkdir -p /code/cache && chmod 777 /code/cache
-# Tell all Hugging Face libraries to use this new directory
+# Create a writable directory for the vector database
+RUN mkdir -p /code/app/chroma_db && chmod -R 777 /code/app/chroma_db
+# Tell all Hugging Face libraries to use the new cache directory
 ENV HF_HOME=/code/cache
 ENV SENTENCE_TRANSFORMERS_HOME=/code/cache
-# --- END: FINAL PERMISSION FIX ---
+# --- END: FINAL PERMISSION FIXES ---
 
 # Copy your application code into the container
 COPY ./app /code/app