Update

app/src/main/java/it/chalmers/gamma/adapter/primary/web/UserAgreementController.java

@@ -0,0 +1,24 @@
+package it.chalmers.gamma.adapter.primary.web;
+
+import org.springframework.stereotype.Controller;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestHeader;
+import org.springframework.web.servlet.ModelAndView;
+
+@Controller
+public class UserAgreementController {
+
+    @GetMapping("/user-agreement")
+    public ModelAndView getUserAgreement(@RequestHeader(value = "HX-Request", required = false) boolean htmxRequest) {
+        ModelAndView mv = new ModelAndView();
+        if (htmxRequest) {
+            mv.setViewName("user-agreement/page");
+        } else {
+            mv.setViewName("index");
+            mv.addObject("page", "user-agreement/page");
+        }
+
+        return mv;
+    }
+
+}

app/src/main/resources/templates/common/header.html

@@ -27,6 +27,9 @@
             <li>
                 <a th:href="@{/posts}">Posts</a>
             </li>
+            <li>
+                <a th:href="@{/user-agreement}">User agreement</a>
+            </li>
             <th:block th:if="${isAdmin}">
                 <hr>
                 <li>

app/src/main/resources/templates/user-agreement/page.html

@@ -0,0 +1,9 @@
+<header th:replace="~{common/header}"></header>
+<main>
+    <article>
+        <header>
+            User agreement
+        </header>
+        <th:block th:replace="~{register-account/user-agreement}" />
+    </article>
+</main>