adding discord redirect (CodingTrain#2827)

_config.yml

@@ -114,6 +114,7 @@ collections:
   challenges: { output: true }
   learning: { output: true }
   more: { output: true }
+  redirects: { output: true }
 
 # --- Defaults ---
 
@@ -192,3 +193,8 @@ defaults:
       video_type: "Teachable Machine"
       video_type_short: "Tutorial"
       can_contribute: true
+
+  # Redirects
+  - scope: { path: "", type: "redirect" }
+    values:
+      layout: "external-redirect"

_jekyll/layouts/external-redirect.html

@@ -0,0 +1,14 @@
+---
+layout: base
+---
+
+<div class="redirect">
+  <p>Redirecting you to {{ page.title }}...</p>
+  <a href="{{ page.redirect_to }}">Click here if you have redirects turned off.</a>
+  <script>
+    function redirect() {
+      window.location.replace("{{ page.redirect_to }}");
+    }
+    setTimeout(redirect, 200);
+  </script>
+</div>

_redirects/discord.md

@@ -0,0 +1,6 @@
+---
+title: Coding Train Discord
+redirect_to: "https://discord.gg/hPuGy2g"
+redirect_from:
+  - "/discord"
+---