Adding upstream version 5.2.3+dfsg.

Signed-off-by: Daniel Baumann <daniel@debian.org>

site/content/docs/5.2/examples/sign-in/index.html

@@ -0,0 +1,32 @@
+---
+layout: examples
+title: Signin Template
+extra_css:
+  - "signin.css"
+body_class: "text-center"
+include_js: false
+---
+
+<main class="form-signin w-100 m-auto">
+  <form>
+    <img class="mb-4" src="/docs/{{< param docs_version >}}/assets/brand/bootstrap-logo.svg" alt="" width="72" height="57">
+    <h1 class="h3 mb-3 fw-normal">Please sign in</h1>
+
+    <div class="form-floating">
+      <input type="email" class="form-control" id="floatingInput" placeholder="name@example.com">
+      <label for="floatingInput">Email address</label>
+    </div>
+    <div class="form-floating">
+      <input type="password" class="form-control" id="floatingPassword" placeholder="Password">
+      <label for="floatingPassword">Password</label>
+    </div>
+
+    <div class="checkbox mb-3">
+      <label>
+        <input type="checkbox" value="remember-me"> Remember me
+      </label>
+    </div>
+    <button class="w-100 btn btn-lg btn-primary" type="submit">Sign in</button>
+    <p class="mt-5 mb-3 text-muted">&copy; 2017–{{< year >}}</p>
+  </form>
+</main>