organize weather data by retrieval time

apps/weather/src/definitions.py

@@ -1,4 +1,5 @@
 import os
+from pathlib import Path
 
 import assets
 import sensors
@@ -10,7 +11,7 @@ import dagster as dg
 
 install()
 
-APP = os.environ["APP"]
+APP = os.environ.get("APP", Path(__file__).parent.parent.name)
 
 storage_dir = os.environ.get("STORAGE_DIR", "/storage") + f"/{APP}"