Add admin routes

web/admin.html

@@ -0,0 +1,14 @@
+
+{{define "title"}}
+    Admin
+{{end}}
+
+{{template "base" .}}
+
+{{define "main"}}
+    <h1>Danger Zone</h1>
+    <div class="budget-item">
+        <button>Clear database</button>
+        <p>This removes all data and starts from scratch. Not undoable!</p>
+    </div>
+{{end}}