Move file distribution to Gitea, deploy server on mivanchenko.de

Drops the standalone fileserver systemd unit from setup-server.sh in
favor of Gitea's already-public raw-file serving. Adds VR (Vivecraft)
and quest (FTB Quests) mod docs, the DH/Chunky server-side crash
warning, and documents the real deployment target (always-on homelab
box, not a venue-local machine).

install.sh

@@ -3,15 +3,15 @@
 # seeds a persistent offline account, drops in the pre-built modpack instance,
 # and launches straight into it on the LAN server.
 #
-# Host this file via: python3 -m http.server 8000
-# Participants run:    curl -fsSL http://<host-ip>:8000/install.sh | bash
+# Hosted from Gitea (git.mivanchenko.de), not a local http.server — see HOSTING.md.
+# Participants run:    curl -fsSL https://git.mivanchenko.de/mivanchenko/mc-lan-party/raw/branch/main/install.sh | bash
 set -euo pipefail
 
 # ---- EDIT ME before hosting ----
-HOST_URL="http://192.168.1.50:8000"     # where THIS script + modpack.zip are served from
-MODPACK_URL="$HOST_URL/modpack.zip"     # exported Prism instance folder, zipped (see HOSTING.md)
+HOST_URL="https://git.mivanchenko.de/mivanchenko/mc-lan-party/raw/branch/main"  # Gitea raw-file base URL
+MODPACK_URL="$HOST_URL/modpack.zip"     # exported Prism instance folder, zipped, committed to the repo (see HOSTING.md)
 INSTANCE_NAME="LANParty"                # must match the top-level folder name inside modpack.zip
-SERVER_ADDR="192.168.1.50:25565"        # your Minecraft server IP:port
+SERVER_ADDR="minecraft.mivanchenko.de:25565"  # DNS name, not a raw IP — repoint the A record to whichever box is running the server (prep machine now, venue box at party time) instead of rebuilding modpack.zip. See HOSTING.md "Moving the server to the venue".
 GH_REPO="unmojang/FjordLauncherUnlocked" # fallback if hero-persson's fork disappears; see note below
 # ---------------------------------