Fixed error in cache dir

app/app.py

@@ -27,8 +27,9 @@ server = app.server
 
 df = pd.read_csv(constants.DATA_FILE_PATH, index_col=constants.INDEX_COLS)
 
-os.makedirs(os.path.dirname(__file__), "cache_dir")
-regionmask.set_options(cache_dir=os.path.join(os.path.dirname(__file__), "cache_dir"))
+cache_dir = os.path.join(os.path.dirname(__file__), "../cache_dir")
+os.makedirs(cache_dir)
+regionmask.set_options(cache_dir=cache_dir)
 countries_df = regionmask.defined_regions.natural_earth_v5_0_0.countries_110.to_dataframe()
 
 # Prescriptor list should be in order of least to most change