🔄 Sync entrypoint and setup scripts from current template 🔄

Ran the AI.md template-update runbook: synced .env.scripts and
Dockerfile ARGs to the current template, regenerated entrypoint.sh
and setup/*.sh from the template, then cleaned up now-dead
DEFAULT_FILE_DIR/DATA_DIR/CONF_DIR/TEMPLATE_DIR references left in
the Dockerfile after the template-files concept was retired.

- .env.scripts: dropped DEFAULT_FILE_DIR/DATA_DIR/CONF_DIR/TEMPLATE_DIR,
  ssmtp -> msmtp, license MIT -> WTFPL, ENV_PULL_URL value updated
- Dockerfile: removed now-unused DEFAULT_FILE_DIR/DATA_DIR/CONF_DIR/
  TEMPLATE_DIR ARG declarations (3 stages) and the mkdir referencing
  them; PACK_LIST ssmtp -> msmtp
- rootfs/usr/local/bin/entrypoint.sh: regenerated from template —
  CONTAINER_NAME set to "rust", safer grep -- usage, exec/shell
  argument handling fixed to not swallow args when none given
- rootfs/usr/local/etc/docker/functions/entrypoint.sh: regenerated
  from template
- rootfs/root/docker/setup/00-init.sh: regenerated; dropped dead
  template-files cleanup block
- rootfs/root/docker/setup/01-system.sh: regenerated (boilerplate only)
- rootfs/root/docker/setup/02-packages.sh: regenerated (boilerplate only)
- rootfs/root/docker/setup/03-files.sh: regenerated — dropped
  template-files mirroring, added /tmp/usr handling
- rootfs/root/docker/setup/04-users.sh: regenerated (boilerplate only)
- rootfs/root/docker/setup/06-post.sh: regenerated (boilerplate only)
- rootfs/root/docker/setup/07-cleanup.sh: regenerated (boilerplate only)

Note: rootfs/root/docker/setup/05-custom.sh was NOT regenerated —
it holds hand-written Rust toolchain install logic, not template
boilerplate; the runbook's blind regenerate would have destroyed it.

rootfs/root/docker/setup/01-system.sh

@@ -1,12 +1,12 @@
 #!/usr/bin/env bash
 # shellcheck shell=bash
 # - - - - - - - - - - - - - - - - - - - - - - - - -
-##@Version           :  202605311104-git
+##@Version           :  202607271318-git
 # @@Author           :  CasjaysDev
 # @@Contact          :  CasjaysDev <docker-admin@casjaysdev.pro>
-# @@License          :  MIT
+# @@License          :  WTFPL
 # @@Copyright        :  Copyright 2026 CasjaysDev
-# @@Created          :  Sun May 31 11:04:49 AM EDT 2026
+# @@Created          :  Mon Jul 27 01:18:35 PM EDT 2026
 # @@File             :  01-system.sh
 # @@Description      :  script to run system
 # @@Changelog        :  newScript
@@ -20,7 +20,7 @@
 # shellcheck disable=SC1001,SC1003,SC2001,SC2003,SC2016,SC2031,SC2090,SC2115,SC2120,SC2155,SC2199,SC2229,SC2317,SC2329
 # - - - - - - - - - - - - - - - - - - - - - - - - -
 # Set bash options
-set -o pipefail
+set -eo pipefail
 [ "$DEBUGGER" = "on" ] && echo "Enabling debugging" && set -x$DEBUGGER_OPTIONS
 # - - - - - - - - - - - - - - - - - - - - - - - - -
 # Set env variables