added a 404 page template

_includes/404.html

@@ -0,0 +1,20 @@
+<section id="team">
+    <div class="container">
+        <div class="row">
+            <div class="col-lg-10 col-lg-offset-1 text-dark">
+                <hr class="primary">
+                <h3 class="section-heading text-center text-dark"> Synapses misfired! </h3>
+                <br>
+                <br>
+                <p class="text-center text-primary"><i class="fa-brands fa-space-awesome fa-4x wow bounceIn" data-wow-delay=".3s"></i></p>
+                <br>
+                <br>
+                <h3 class="section-heading text-center text-dark"> Our brain cells are working overtime to locate the missing page. </h3>
+                <hr class="primary">
+                <br>
+                <br>
+                <h3 class="section-heading text-center text-dark"> If you believe this is a mistake, please don't hesitate to <a href="#contact" class="page-scroll">contact us</a>.</h3>
+
+            </div>
+    </div>
+</section>

_includes/ossig.html

@@ -3,7 +3,7 @@
         <div class="row">
             <div class="col-lg-10 col-lg-offset-1 text-dark">
                 <p class="text-center text-primary"><i class="fa-solid fa-users fa-4x wow bounceIn" data-wow-delay=".3s"></i></p>
-                <h2 class="section-heading text-center text-primary">Brainhack Team</h3>
+                <h2 class="section-heading text-center text-primary">Brainhack Team</h2>
                 <hr class="primary">
 
                 {% for member in site.data.team.hackathon %}
@@ -44,7 +44,7 @@ <h2 class="section-heading text-center text-primary">Brainhack Team</h3>
                     <li>Facilitating collaborative work on a wide range of open science projects</li>
                 </ul>
                 <br>
-                <h2 class="section-heading text-center text-primary">OSSIG Team</h3>
+                <h2 class="section-heading text-center text-primary">OSSIG Team</h2>
                 <hr class="primary">
                 <p class="h4">The Brainhack Team is a part of the broader OHBM OSSIG (Open Science Special Interest Group), collaborating on various open science initiatives, including the Brainhack and the Open Science Rooms. OSSIG members actively contribute to advancing open science principles and practices.</p>
 

not_found.html

@@ -0,0 +1,8 @@
+---
+layout: default
+title: Page not found!
+message: "--- Error 404 ---"
+permalink: /404/
+image: 404.jpg
+templateFile: 404.html
+---