Add expiring panel auth sessions

README.md

@@ -26,6 +26,14 @@ Default panel credentials:
 - login: `admin`
 - password: `proxy-ui-demo`
 
+For Docker runs these values come from `compose.yaml`:
+
+- `PANEL_AUTH_LOGIN`
+- `PANEL_AUTH_PASSWORD`
+- `PANEL_SESSION_TTL_HOURS` with a default of `24`
+
+The panel stores the issued session token in `sessionStorage`, so a browser refresh keeps the operator signed in until the token expires.
+
 ## Docker run
 
 ```bash