fix(astro): URLs in meta.image

Author: AriPerkkio

docs/tutorialkit.dev/src/content/docs/reference/configuration.mdx

@@ -430,6 +430,7 @@ type DownloadAsZip =
 
 Configures `<meta>` tags for Open Graph protocole and Twitter.
 TutorialKit will use your logo as the default image.
+Relative paths are resolved to `public` directory.
 <PropertyTable inherited type="MetaTagsSchema" />
 
 The `MetaTagsSchema` type has the following shape:
@@ -449,6 +450,13 @@ meta:
   image: /cover.png
   title: Title shown on social media and search engines
   description: Description shown on social media and search engines
+
+meta:
+  image: /cover.png # Resolves to public/cover.png
+
+meta:
+  image: 'https://tutorialkit.dev/tutorialkit-opengraph.png' # URL is used as is
+
 ```
 
 :::tip

packages/astro/src/default/components/MetaTags.astro

@@ -7,13 +7,16 @@ interface Props {
   meta?: MetaTagsConfig;
 }
 const { meta = {} } = Astro.props;
-let imageUrl;
-if (meta.image) {
-  imageUrl = readPublicAsset(meta.image, true);
+let imageUrl = meta.image;
+
+if (imageUrl?.startsWith('/') || imageUrl?.startsWith('.')) {
+  imageUrl = readPublicAsset(imageUrl, true);
+
   if (!imageUrl) {
     console.warn(`Image ${meta.image} not found in "/public" folder`);
   }
 }
+
 imageUrl ??= readLogoFile('logo', true);
 ---