Fix: Replace invalid 'file' directive with 'try_files' in Caddyfile

- Changed 'file favicon.png' to 'try_files {path}' which is the correct Caddy syntax
- Updated root path to /app/public for consistency
- This fixes the 'unrecognized directive: file' error in Caddy

Caddyfile

@@ -44,6 +44,6 @@ favicon.ico {
 }
 
 favicon.png {
-    root * /app/dist
+    root * /app/public
-    file favicon.png
+    try_files {path}
 }