feat: add the switch for open graph.

astro.config.ts

@@ -35,6 +35,8 @@ export default defineConfig({
         ARTALK_SCHEME: envField.string({ context: 'server', access: 'secret' }),
         ARTALK_HOST: envField.string({ context: 'server', access: 'secret' }),
         ARTALK_PORT: envField.number({ context: 'server', access: 'secret' }),
+        // Build the Open Graph
+        BUILD_OPEN_GRAPH: envField.boolean({ context: 'server', access: 'public', default: true }),
       },
       validateSecrets: true,
     },

src/pages/images/og/[slug].png.ts

@@ -2,13 +2,14 @@ import { defaultOpenGraph, drawOpenGraph } from '@/helpers/og';
 import { getPage, getPost, pages, posts } from '@/helpers/schema';
 import options from '@/options';
 import type { APIRoute } from 'astro';
-
+import { BUILD_OPEN_GRAPH } from 'astro:env/server';
 const fallback = async () =>
   new Response(await defaultOpenGraph(), {
     headers: { 'Content-Type': 'image/png' },
   });
 
-export const prerender = true;
+// This endpoint can be controlled by using environment variable.
+export const prerender = BUILD_OPEN_GRAPH;
 
 export const GET: APIRoute = async ({ params }) => {
   const slug = params.slug;