add doctype and viewport to the verification pages

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

verification_server/src/templates/error.html

@@ -1,5 +1,8 @@
+<!doctype html>
 <html>
   <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
     <title>Noe rota seg til 😳</title>
     <link href="{{ url_for('static', path='/base.css') }}" rel="stylesheet" />
   </head>

verification_server/src/templates/success.html

@@ -1,5 +1,8 @@
+<!doctype html>
 <html>
   <head>
+    <meta charset="utf-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1" />
     <title>Autentisering fullført!</title>
     <link href="{{ url_for('static', path='/base.css') }}" rel="stylesheet" />
   </head>