Add gamejam redirect

app/blueprints/homepage/__init__.py

@@ -1,4 +1,4 @@
-from flask import Blueprint, render_template
+from flask import Blueprint, render_template, redirect
 
 bp = Blueprint("homepage", __name__)
 
@@ -25,6 +25,11 @@ class GameJam:
 	reviews = []
 
 
+@bp.route("/gamejam/")
+def gamejam():
+	return redirect("https://forum.minetest.net/viewtopic.php?t=27512")
+
+
 @bp.route("/")
 @menu.register_menu(bp, ".", "Home")
 def home():