fix(security): deny config/VCS dotfiles over HTTP on standalone cac and cac-litespeed

Measured on .148: standalone cac served /.env with its contents, and
cac-litespeed served /.env even at mode 0640 (OLS runs as the customer uid
there). shared-httpd and shared-ols already deny these via WHP's drop-ins; the
standalone tiers never got them.

- cac: new configs/whp-security.conf in /etc/httpd/conf.d — the same named
  FilesMatch + DirectoryMatch list as WHP's shared-httpd-security.conf,
  re-rooted to /home.
- cac-litespeed: the same `context exp:` regex as WHP's shared-ols vhconf
  template, added to the vhost template.

Named list (.user.ini .env* .git .svn .hg .bzr .ht* .whp .site-builder), not a
blanket dotfile deny, so /.well-known/ stays reachable. HTTP only: PHP still
reads these files from disk.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

Dockerfile

@@ -40,6 +40,7 @@ COPY ./configs/phpinfo.php /var/www/html/
 COPY ./configs/mariadb.repo /etc/yum.repos.d/
 COPY ./configs/index.php /var/www/html/
 COPY ./configs/remote_ip.conf /etc/httpd/conf.d/
+COPY ./configs/whp-security.conf /etc/httpd/conf.d/
 
 # Set up cron job in a single layer
 RUN echo "15 */12 * * * root /scripts/log-rotate.sh" >> /etc/crontab

configs/litespeed/site-template.tpl

@@ -72,6 +72,18 @@ virtualHostConfig  {
     addDefaultCharset     off
   }
 
+  ## SECURITY: never serve config / VCS dotfiles over HTTP. Same named list as
+  ## WHP's shared-ols vhconf template (first `context exp:` there) and
+  ## shared-httpd's 000-whp-security.conf. Measured on .148: this tier served
+  ## /.env even at mode 0640, because OLS runs as the customer uid here. An
+  ## `exp:` regex context wins over the `context /` prefix context regardless
+  ## of order (measured on OLS 1.8.4 for shared-ols), so a customer .htaccess
+  ## cannot reopen it. Named, not blanket "^\.": /.well-known/ (ACME,
+  ## security.txt, app-site-association) must stay reachable.
+  context exp:^/(.*/)?\.(user\.ini|env|git|svn|hg|bzr|ht|whp|site-builder) {
+    allowBrowse           0
+  }
+
   rewrite  {
     enable                1
     autoLoadHtaccess      1

configs/whp-security.conf

@@ -0,0 +1,29 @@
+## SECURITY: never serve config / VCS dotfiles over HTTP (standalone cac).
+##
+## Same named list as WHP's shared-httpd drop-in (web-files/configs/
+## shared-httpd-security.conf, 000-whp-security.conf on every shared-httpd host),
+## re-rooted from /mnt/users to /home because here the docroot is
+## /home/<user>/public_html. Standalone cac never got that drop-in, and measured
+## on .148 it served /.env with contents.
+##
+## <FilesMatch> matches the FILENAME resolved from the filesystem path, not the
+## request URL, so it cannot be side-stepped by URL-encoding. httpd applies
+## <Directory> sections (and .htaccess) first and <Files>/<FilesMatch> after
+## them, so this deny wins over create-vhost.sh's `Require all granted`.
+##
+## A NAMED LIST, NOT A BLANKET "^\." DENY: /.well-known/ (ACME, security.txt,
+## apple-app-site-association, assetlinks.json, payment-domain verification)
+## must stay reachable. FilesMatch tests the final path component, and for
+## /.well-known/acme-challenge/<token> that is <token>, not a dotfile.
+##
+## HTTP only: PHP still reads .user.ini and .env off the filesystem as before.
+<Directory "/home">
+    <FilesMatch "^\.(user\.ini|env|git|svn|hg|bzr|ht|whp|site-builder)">
+        Require all denied
+    </FilesMatch>
+</Directory>
+## Directory form: reaches the files INSIDE .git/ etc. (e.g. /.git/config,
+## whose own name is not a dotfile).
+<DirectoryMatch "^/home/.*/\.(git|svn|hg|bzr|whp|site-builder)(/|$)">
+    Require all denied
+</DirectoryMatch>