Added georestriction with SFW mode.

src/web/auth.js

@@ -1,6 +1,7 @@
 /* eslint-disable no-param-reassign */
 import { stringify } from '@brillout/json-serializer/stringify'; /* eslint-disable-line import/extensions */
 import IPCIDR from 'ip-cidr';
+import argv from '../argv.js';
 
 import {
 	login,
@@ -14,6 +15,10 @@ import {
 import { fetchUser } from '../users.js';
 
 function getIp(req) {
+	if (argv.ip) {
+		return argv.ip;
+	}
+
 	const ip = req.headers['x-forwarded-for']?.split(',')[0] || req.connection.remoteAddress;
 
 	const unmappedIp = ip?.includes('.')