Register dta_blog for node-static deploy (closes #29)

Catalog + host_apps on all webservers (prod 8086 / beta 8087) with webroots
under /var/www/{env}.blog.realpath.app/html. Nginx serves the SSG 404 page
instead of SPA index fallback.

inventory/group_vars/all.yml

@@ -80,6 +80,15 @@ app_catalog:
     webroot_pattern: "/var/www/{env}.realpath.app/html"
     # deploy runs `npm ci` then `npm run build:<env>`; that script writes to
     # {{ web_static_root }}/<env>_dta_webapp (beta/prod), served by web-static.
+  dta_blog:
+    type: node-static
+    repo: "{{ git_base_url }}/Ditch_The_Agent/dta_blog.git"
+    default_branch: main
+    # Python SSG (stdlib). package.json build:<env> copies dist/ to this webroot
+    # so the existing node-static path (`npm ci` then `npm run build:<env>`) works.
+    webroot_pattern: "/var/www/{env}.blog.realpath.app/html"
+    # Real 404 page (not SPA index fallback). See roles/web-static nginx.conf.j2.
+    error_page_404: /404.html
   scha:
     type: django
     repo: "{{ git_base_url }}/ai_ml_operations/scha.git"