feat: use caddy to serve static bundles to reduce manually reinventing it all in bun server

Caddyfile

@@ -0,0 +1,31 @@
+{
+  auto_https off
+  admin off
+}
+
+:80 {
+  encode zstd gzip
+
+  @api path /api/*
+  handle @api {
+    reverse_proxy 127.0.0.1:3000
+  }
+
+  @root path /
+  handle @root {
+    reverse_proxy 127.0.0.1:3000
+  }
+
+  handle {
+    root * /srv/public
+
+    @html path /index.html /d/*
+    header @html Cache-Control "no-cache"
+
+    @assets path_regexp assets \.(?:css|js|mjs|svg|png|jpg|jpeg|gif|webp|ico|woff2?|ttf|otf)$
+    header @assets Cache-Control "public, max-age=31536000, immutable"
+
+    try_files {path} /index.html
+    file_server
+  }
+}