feat(auth): Add basic authentication to app

app/app.py

@@ -1,6 +1,8 @@
 import json
+import os
 from typing import Any, Dict, Tuple
 
+import dash_auth
 import pandas as pd
 from app_styles import header_style
 from dash import (
@@ -22,6 +24,10 @@ from sql_utils import execute_query, test_db_connection
 external_stylesheets = ["https://codepen.io/chriddyp/pen/bWLwgP.css"]
 
 app = Dash(__name__, external_stylesheets=external_stylesheets)
+auth = dash_auth.BasicAuth(
+    app,
+    {os.getenv("APP_UNAME"): os.getenv("APP_PW")},
+)
 app.index_string = header_style
 
 notification_md = """