add filter_options.json

app.py

@@ -218,7 +218,7 @@ def serialize_documents(sources):
 @st.cache_data
 def load_filter_options():
     try:
-        with open("filter_options.json", "r") as f:
+        with open("src/config/filter_options.json", "r") as f:
             return json.load(f)
     except FileNotFoundError:
         st.info([x for x in os.listdir() if x.endswith('.json')])