[PIE-14] More robust API proxy (!7)

Finally! Using an Astro API Route to handle all the queries which works like a dream. Also created a custom function to get the relative path for image files, fixing any external access issues.
Co-authored-by: june <self@breadone.net>
Co-committed-by: june <self@breadone.net>

src/components/Card/OverviewCard.astro

@@ -5,7 +5,7 @@ import TagRow from "./TagRow.astro"
 const { recipe } = Astro.props;
 
 const headerImage = await client.collection("images").getOne(recipe.images[0])
-const image = await client.files.getURL(headerImage, headerImage.image)
+const image = await client.files.getRelativeURL(headerImage, headerImage.image)
 ---
 
 <div class="relative z-0 flex h-50">