added authentication

src/main.py

@@ -15,6 +15,8 @@ necesasary_var_list = {
     "MONGO_COLLECTION",
     "MONGO_USER",
     "MONGO_PASSWORD",
+    "DASH_AUTH_USERNAME",
+    "DASH_AUTH_PASSWORD"
 }
 for env_var in necesasary_var_list:
     # ensure env var set

src/web/app.py

@@ -1,8 +1,10 @@
 from dash import Dash, Input, Output, State, ALL
 import dash_bootstrap_components as dbc
+from dash_auth import BasicAuth
 import logging
 from typing import List
 from pydantic import ValidationError
+import os
 
 from .layout import app_layout
 from src.database import (
@@ -19,6 +21,12 @@ app.title = "visual critical discourse analysis".title()
 app.layout = app_layout
 server = app.server
 
+# setup authentication
+AUTH_DICT = {
+    os.getenv("DASH_AUTH_USERNAME"): os.getenv("DASH_AUTH_PASSWORD")
+}
+BasicAuth(app, AUTH_DICT)
+
 # connect to database
 collection, db, client = connect()