update app.py to provide nonce

app.py

@@ -331,6 +331,7 @@ def admin():
         photos=photos,
         accent_color=config["appearance"]["accent_color"],
         config=config,
+        nonce=g.csp_nonce,
     )
 
 @app.route("/admin/logout")

templates/admin.html

@@ -261,7 +261,7 @@
             </div>
         </div>
     </div>
-    <script nonce="{{ g.csp_nonce }}">
+    <script nonce="{{ nonce }}">
         function makeEditable(element) {
             const value = element.textContent;
             const input = document.createElement('input');