changed the data dir to hf compatible

app/services/document_ingester.py

@@ -14,7 +14,8 @@ class Ingester:
             model_name="sentence-transformers/all-MiniLM-L6-v2"
         )
         load_dotenv()
-        self.DATA_DIR = os.getenv("DATA_DIR")
+        base_dir = os.getenv("HF_HOME", "/home/user/app")
+        self.DATA_DIR = os.path.join(base_dir, "data")
         self.vector_store= Chroma(
             collection_name="documents_collection",
             embedding_function=self.embedding_model,

app/services/retriever.py

@@ -12,7 +12,8 @@ class Retriever:
             model_name="sentence-transformers/all-MiniLM-L6-v2"
         )
         load_dotenv()
-        self.DATA_DIR = os.getenv("DATA_DIR")
+        base_dir = os.getenv("HF_HOME", "/home/user/app")
+        self.DATA_DIR = os.path.join(base_dir, "data")
         self.vector_store=Chroma(
             collection_name="documents_collection",
             embedding_function=self.embed,