Subnautica: add an install guide

WebHostLib/static/assets/tutorial/Subnautica/setup_en.md

@@ -0,0 +1,32 @@
+# Subnautica Randomizer Setup Guide
+
+## Required Software
+
+- [Subnautica](https://store.steampowered.com/app/264710/Subnautica/)
+- [QModManager4](https://www.nexusmods.com/subnautica/mods/201)
+- [Archipelago Mod for Subnautica](https://github.com/Berserker66/ArchipelagoSubnauticaModSrc/releases)
+
+
+## Installation Procedures
+
+1. Install QModManager4 as per its instructions.
+
+2. The folder you installed QModManager4 into will now have a /QMods directory. It might appear after a start of Subnautica. You can also create this folder yourself.
+
+3. Unpack the Archipelago Mod into this folder, so that Subnautica/QMods/Archipelago/ is a valid path.
+
+4. Start Subnautica. You should see a Connect Menu in the topleft of your main Menu. 
+
+## Troubleshooting
+
+If you don't see the connect window check that you see a qmodmanager_log-Subnautica.txt in Subnautica, if not QModManager4 is not correctly installed, otherwise open it and look for `[Info   :   BepInEx] Loading [Archipelago 1.0.0.0]`, version number doesn't matter. If it doesn't show this, then QModManager4 didn't find the Archipelago mod, so check your paths.
+    
+## Joining a MultiWorld Game
+
+1. In Host, enter the address of the server, such as archipelago.gg:38281, your server host should be able to tell you this.
+
+2. In Password enter the server password if one exists, otherwise leave blank.
+
+3. In PlayerName enter your "name" field from the yaml, or website config.
+
+4. Hit Connect. If it says succesfully authenticated you can now create a new savegame or resume the correct savegame.

WebHostLib/static/assets/tutorial/tutorials.json

@@ -224,6 +224,25 @@
       }
     ]
   },
+  {
+    "gameTitle": "Subnautica",
+    "tutorials": [
+      {
+        "name": "Multiworld Setup Guide",
+        "description": "A guide to setting up the Subnautica randomizer connected to an Archipelago Multiworld",
+        "files": [
+          {
+            "language": "English",
+            "filename": "Subnautica/setup_en.md",
+            "link": "Subnautica/setup/en",
+            "authors": [
+              "Berserker"
+            ]
+          }
+        ]
+      }
+    ]
+  },
   {
     "gameTitle": "Super Metroid",
     "tutorials": [