small fixes

frontend/astro.config.js

@@ -6,6 +6,7 @@ import mdx from '@astrojs/mdx';
 
 // https://astro.build/config
 export default defineConfig({
+  site: import.meta.env.PROD ? 'https://filipesm.eu' : 'http://localhost:1234',
   integrations: [tailwind(), mdx()],
   markdown: {
     remarkPlugins: [flattenListItems],

frontend/src/components/Metadata.astro

@@ -28,6 +28,10 @@ const imageUrl = image
 <meta name="og:title" content={title} />
 <meta name="description" content={description} />
 <meta name="og:description" content={description} />
-{imageUrl && <meta name="og:image" content={imageUrl} />}
+{
+  imageUrl && (
+    <meta name="og:image" content={`${import.meta.env.SITE}${imageUrl}`} />
+  )
+}
 {image && <meta name="og:image:alt" content={image.altText} />}
 <!-- I exclude Twitter meta tags on purpose :) I miss Twitter -->