DS3: Add the Dark Souls 3 World into Archipelago (#769)

WebHostLib/templates/macros.html

@@ -43,6 +43,9 @@
                         {% elif patch.game in ["A Link to the Past", "Secret of Evermore", "Super Metroid", "SMZ3"] %}
                         <a href="{{ url_for("download_patch", patch_id=patch.id, room_id=room.id) }}" download>
                             Download Patch File...</a>
+                        {% elif patch.game == "Dark Souls III" %}
+                        <a href="{{ url_for("download_slot_file", room_id=room.id, player_id=patch.player_id) }}" download>
+                            Download JSON File...</a>
                         {% else %}
                             No file to download for this game.
                         {% endif %}