rename factorio to fctr to match linuxgsm

Author: LoadingStill

templates/games/factorio.html renamed to templates/games/fctr.html

@@ -8,7 +8,7 @@ <h1>Factorio</h1>
 
 {% block sidebar %}
     <div class="sidebar-images">
-        <img src="https://cdn.cloudflare.steamstatic.com/steam/apps/427520/library_600x900.jpg?t=1597145422" alt="Factorio Poster">
+        <img src="static/images/fctr.jpg" alt="Factorio Poster">
     </div>
 
     <div class="sidebar-buttons">