improved opening images

web/opener/Image.svelte

@@ -2,9 +2,11 @@
 	export let contentType: string;
 	export let filename: string;
 	export let slug: string;
+
+    let ext = filename.split('.').pop();
 </script>
 
-<img src="/s/{slug}" alt="shared" /> 
+<img src="/s/{slug}.{ext}" alt="shared" /> 
 
 <style>
     img {