chore: remove pack (packwiz) service and subdomain

The pack service was already gone from compose/caddy and the landing is
off packwiz. Remove the remaining live references: the pack. TLS vhost in
the host nginx template, pack from LE_SUBDOMAINS, and stale docs in README
and CLAUDE.md.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

README.md

@@ -1,9 +1,9 @@
 # Ulicraft Server
 
 Self-hosted modded Minecraft (NeoForge 1.21.1) with self-hosted auth/skins
-(Drasl), a packwiz modpack, avatar rendering, a guest landing page, and uptime
-monitoring. One unified `docker-compose.yml` runs the whole stack behind the
-host's nginx + Let's Encrypt.
+(Drasl), a distribution-fed modpack, avatar rendering, a guest landing page, and
+uptime monitoring. One unified `docker-compose.yml` runs the whole stack behind
+the host's nginx + Let's Encrypt.
 
 ## Stack
 
@@ -22,7 +22,6 @@ Vhosts (all proxied through the host nginx → caddy):
 
 - apex `${BASE_DOMAIN}` — landing page + `/launcher/` downloads
 - `auth.` — Drasl
-- `pack.` — packwiz metadata + `/custom/` jars
 - `avatar.` — NMSR
 - `status.` — Uptime Kuma
 - `distribution.` — static site from another repo (`DISTRIBUTION_WEB_ROOT`)
@@ -33,12 +32,11 @@ Config lives in `.env`: `BASE_DOMAIN`, `RCON_PASSWORD`, `CADDY_HTTP_PORT` /
 ## DNS
 
 Handled **outside this repo**. Point `${BASE_DOMAIN}` and every subdomain
-(`auth. pack. avatar. status. distribution. www.`) at the host running nginx.
+(`auth. avatar. status. distribution. www.`) at the host running nginx.
 
 ## Prerequisites
 
-Docker + Docker Compose; for prep also `pnpm`, `packwiz`, `jq`, `curl`,
-`envsubst`.
+Docker + Docker Compose; for prep also `pnpm`, `jq`, `curl`, `envsubst`.
 
 ## Launch
 
@@ -46,7 +44,8 @@ Docker + Docker Compose; for prep also `pnpm`, `packwiz`, `jq`, `curl`,
 cp .env.example .env            # set BASE_DOMAIN, RCON_PASSWORD, DISTRIBUTION_WEB_ROOT
 
 # One-time / on change — render configs + build content:
-tooling/render-config.sh        # drasl + nmsr + packwiz configs from *.tmpl
+tooling/render-config.sh        # drasl + nmsr configs from *.tmpl
+tooling/sync-server-mods.sh     # filtered server mods → ./server-mods
 ( cd landing && pnpm install && BASE_DOMAIN="$BASE_DOMAIN" pnpm run build )   # → www/
 tooling/fetch-launcher.sh       # FjordLauncher assets → launcher/ (served at /launcher/)
 tooling/fetch-authlib.sh        # authlib-injector.jar → runtime/ (server JVM agent)
@@ -55,7 +54,7 @@ docker compose up -d --build    # first run installs NeoForge + mods, builds nms
 docker compose down             # stop
 ```
 
-First boot: itzg installs NeoForge + the packwiz mods into the `mc_data` volume;
+First boot: itzg installs NeoForge + the synced server mods into the `mc_data` volume;
 nmsr does a one-time Rust compile. Watch `docker compose logs -f minecraft` until
 `Done`.
 
@@ -69,7 +68,7 @@ certs and reverse-proxies every vhost to caddy by Host header. HTTPS-only: HTTP
 1. **Issue certs** (OVH DNS-01, no inbound ports needed):
    ```sh
    # .env: BASE_DOMAIN, LE_EMAIL, OVH_* creds,
-   #   LE_SUBDOMAINS="auth pack distribution www avatar status"
+   #   LE_SUBDOMAINS="auth distribution www avatar status"
    tooling/issue-letsencrypt.sh        # → certs/<name>/{cert,key}.pem
    ```
 
@@ -120,7 +119,6 @@ persists in the `kuma_data` volume):
 | Minecraft | Minecraft Server | `minecraft` : `25565` |
 | Drasl auth | HTTP(s) | `https://auth.${BASE_DOMAIN}` |
 | Landing (apex) | HTTP(s) | `https://${BASE_DOMAIN}` |
-| Packwiz | HTTP(s) | `https://pack.${BASE_DOMAIN}` |
 | Distribution | HTTP(s) | `https://distribution.${BASE_DOMAIN}` |
 | Avatar (NMSR) | HTTP(s) | `https://avatar.${BASE_DOMAIN}` |
 
@@ -161,7 +159,7 @@ Wired in `landing/src/data/site.ts` (`statusApi`) and `caddy/conf.d/10-static.ca
 2. Add an **authlib-injector** account, URL
    `https://auth.${BASE_DOMAIN}/authlib-injector` (register/login at
    `https://auth.${BASE_DOMAIN}`).
-3. Import the pack: `https://pack.${BASE_DOMAIN}/pack.toml`.
+3. The launcher installs the modpack from the distribution automatically.
 4. Connect to **`${BASE_DOMAIN}`** (Minecraft, `:25565`).
 
 ## Layout
@@ -173,11 +171,11 @@ caddy/Caddyfile + conf.d/*.caddy      # ingress vhost snippets
 drasl/config/config.toml.tmpl         # auth config (rendered)
 nmsr/config.toml.tmpl                 # avatar renderer config, Drasl-backed (rendered)
 docker/nmsr/                          # built-from-source NMSR image
-pack/                                 # packwiz modpack source
 landing/                              # Astro site → www/
 launcher/                             # FjordLauncher assets (gitignored)
-tooling/                             # render-config, render-pack, render-nginx,
-                                      #   issue-letsencrypt, fetch-launcher, add-custom-mod
+server-mods/                          # filtered server mod jars (synced, gitignored)
+tooling/                             # render-config, sync-server-mods, render-nginx,
+                                      #   issue-letsencrypt, fetch-launcher
 nginx/ulicraft-caddy.conf.tmpl        # host-nginx TLS vhost template (front of caddy)
 plan/                                 # design docs
 ```