Add cac-litespeed image family (OpenLiteSpeed, native LSAPI)

New paid-tier per-customer image built on litespeedtech/openlitespeed:1.8.4-lsphpNN.
Matrix: 8.1-8.5. Native LSAPI suexec to customer uid, server-level LSCache,
all WP/WooCommerce extensions (memcached, redis, imagick, mbstring, etc.) baked in.

Files:
- Dockerfile.litespeed (FROM prebuilt LiteSpeed base, layers wp-cli/composer/mariadb)
- configs/litespeed/{httpd_config,site-template,lsphp-overrides}.tpl
- scripts/{entrypoint,create-vhost,detect-memory}-litespeed.sh + install-lscache-wp.sh

CI: new Build-LiteSpeed-Images matrix job. OLS_VERSION pinned to 1.8.4 (only
release with prebuilt images for all 5 PHP versions on Docker Hub).

Spec: whp/docs/superpowers/specs/2026-06-01-cac-litespeed-design.md

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

.gitea/workflows/build-push.yaml

@@ -73,6 +73,50 @@ jobs:
             repo.anhonesthost.net/cloud-hosting-platform/cac-fpm:php${{ matrix.phpver }}
             ${{ matrix.phpver == '85' && 'repo.anhonesthost.net/cloud-hosting-platform/cac-fpm:latest' || '' }}
 
+  Build-LiteSpeed-Images:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        # PHP 7.4/8.0 deliberately excluded — the LiteSpeed prebuilt base
+        # images stop at older OLS releases for those PHP versions, and the
+        # cac-litespeed tier is a paid premium offering: 8.1+ is the
+        # modernization story we're selling.
+        phpver: [81, 82, 83, 84, 85]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Login to Gitea
+        uses: docker/login-action@v3
+        with:
+          registry: repo.anhonesthost.net
+          username: ${{ secrets.CI_USER }}
+          password: ${{ secrets.CI_TOKEN }}
+
+      - name: Build and Push LiteSpeed Image
+        uses: docker/build-push-action@v6
+        with:
+          file: ./Dockerfile.litespeed
+          platforms: linux/amd64
+          push: true
+          build-args: |
+            PHPVER=${{ matrix.phpver }}
+            OLS_VERSION=1.8.4
+          # OLS_VERSION pinned to 1.8.4 — only release with prebuilt images
+          # for every PHP version we ship (1.8.5 and 1.9.0 don't have an
+          # lsphp81 variant on Docker Hub). Bump alongside a local rebuild
+          # test when LiteSpeed publishes lsphp81 on a newer OLS release.
+          # See spec: docs/superpowers/specs/2026-06-01-cac-litespeed-design.md
+          tags: |
+            repo.anhonesthost.net/cloud-hosting-platform/cac-litespeed:php${{ matrix.phpver }}
+            ${{ matrix.phpver == '85' && 'repo.anhonesthost.net/cloud-hosting-platform/cac-litespeed:latest' || '' }}
+
   Build-Shared-httpd:
     runs-on: ubuntu-latest
     steps: