Added `office-at-hifis.net`

_layouts/team.html

@@ -17,6 +17,11 @@ It does on purpose NOT include the content of the markdown page.
         <section>
             <article>
                 <div>
+                    <h1>Contact</h1>
+
+                    Write the HIFIS team: <code class="language-plaintext highlighter-rouge">office-at-hifis.net</code>.
+
+
                     <h1>Team</h1>
                     <div class="team_list">
                         {%- for person in team_members_core -%}