Build installer and management site from spec

views/partials/navbar.ejs

@@ -0,0 +1,12 @@
+<header class="adminHeader">
+  <a class="brandLink" href="/op/dashboard">
+    <span class="brandMark">MC</span>
+    <span>관리자 페이지</span>
+  </a>
+  <details class="userMenu">
+    <summary><%= userId %></summary>
+    <form method="post" action="/op/logout">
+      <button type="submit">로그아웃</button>
+    </form>
+  </details>
+</header>