Add Strapi CMS with Article and Category content types

Article is deliberately minimal: title, slug, Markdown body, cover image and
category. No Author content type — the administrator is the only writer.

The bootstrap hook grants the Public role find/findOne on the two content types
and disables self-registration, so the public API is read-only and the site has
no front-end accounts.

cms/src/api/article/content-types/article/schema.json

@@ -0,0 +1,40 @@
+{
+  "kind": "collectionType",
+  "collectionName": "articles",
+  "info": {
+    "singularName": "article",
+    "pluralName": "articles",
+    "displayName": "Article",
+    "description": "Blog article"
+  },
+  "options": {
+    "draftAndPublish": true
+  },
+  "attributes": {
+    "title": {
+      "type": "string",
+      "required": true,
+      "maxLength": 160
+    },
+    "slug": {
+      "type": "uid",
+      "targetField": "title",
+      "required": true
+    },
+    "content": {
+      "type": "richtext",
+      "required": true
+    },
+    "cover": {
+      "type": "media",
+      "multiple": false,
+      "allowedTypes": ["images"]
+    },
+    "category": {
+      "type": "relation",
+      "relation": "manyToOne",
+      "target": "api::category.category",
+      "inversedBy": "articles"
+    }
+  }
+}

cms/src/api/article/controllers/article.ts

@@ -0,0 +1,3 @@
+import { factories } from '@strapi/strapi';
+
+export default factories.createCoreController('api::article.article');

cms/src/api/article/routes/article.ts

@@ -0,0 +1,3 @@
+import { factories } from '@strapi/strapi';
+
+export default factories.createCoreRouter('api::article.article');

cms/src/api/article/services/article.ts

@@ -0,0 +1,3 @@
+import { factories } from '@strapi/strapi';
+
+export default factories.createCoreService('api::article.article');