use collections and provide rss feed for the blog

src/content/config.ts

@@ -0,0 +1,14 @@
+import { z, defineCollection } from 'astro:content';
+const posts = defineCollection({
+  type: 'content',
+  schema: z.object({
+    title: z.string(),
+    description: z.string(),
+    publishDate: z.string(),
+    tags: z.array(z.string()),
+    image: z.string().optional(),
+  }),
+});
+export const collections = {
+  posts,
+};