Panel assets are not loaded / 404


I’m using Kirby 3 with a docker setup (nginx / php-fpm).

When I open the panel, the page loads but all assets (CSS/JS) are not loaded:

I don’t quite understand how Kirby defines the path to the assets. (I guess the hash value results from the particular version?).

I have the following structure for this project:

├─ kirby/
│     └─ panel
│         └─ dist
│              └─ css
│              └─ img
│              └─ js
├─ public/
│     └─ index.php // entry point of web server
├─ site/
├─ storage/

the index.php has this content:

include __DIR__ . '/../vendor/autoload.php';

$kirby = new \Kirby\Cms\App([
    'roots' => [
        // 'index'    => __DIR__,
        'kirby'    => __DIR__ . '/../kirby',
        'site'     => __DIR__ . '/../site',
        'storage'  => __DIR__ . '/../storage',
        'content'  => __DIR__ . '/../storage/content',
        'media'    => __DIR__ . '/../storage/media',
        'accounts' => __DIR__ . '/../storage/accounts',
        'cache'    => __DIR__ . '/../storage/cache',
        'sessions' => __DIR__ . '/../storage/sessions',
echo $kirby->render();

my nginx config is the following:

server {
      listen 80 default_server;
      listen [::]:80;

      index index.php index.html;

      server_name localhost;

      root /app/public;

      client_max_body_size 1024M;

      default_type text/plain;
      add_header X-Content-Type-Options nosniff;

      rewrite ^\/(content|site|kirby)/(.*)$ /error last;
      rewrite ^\/\.(?!well-known\/) /error last;

      location / {
        try_files $uri $uri/ /index.php$is_args$args;

      location ~* \.php$ {
        fastcgi_param  GATEWAY_INTERFACE  CGI/1.1;
        fastcgi_param  SERVER_SOFTWARE    nginx;
        fastcgi_param  QUERY_STRING       $query_string;
        fastcgi_param  REQUEST_METHOD     $request_method;
        fastcgi_param  CONTENT_TYPE       $content_type;
        fastcgi_param  CONTENT_LENGTH     $content_length;
        fastcgi_param  SCRIPT_FILENAME    $document_root$fastcgi_script_name;
        fastcgi_param  SCRIPT_NAME        $fastcgi_script_name;
        fastcgi_param  REQUEST_URI        $request_uri;
        fastcgi_param  DOCUMENT_URI       $document_uri;
        fastcgi_param  DOCUMENT_ROOT      $document_root;
        fastcgi_param  SERVER_PROTOCOL    $server_protocol;
        fastcgi_param  REMOTE_ADDR        $remote_addr;
        fastcgi_param  REMOTE_PORT        $remote_port;
        fastcgi_param  SERVER_ADDR        $server_addr;
        fastcgi_param  SERVER_PORT        $server_port;
        fastcgi_param  SERVER_NAME        $server_name;

        fastcgi_split_path_info ^(.+\.php)(/.+)$;
        fastcgi_param PATH_INFO $fastcgi_path_info;
        fastcgi_param SERVER_PORT 8080;

        try_files $uri =404;
        fastcgi_pass php;

Does anyone have any tips on what I need to change to get the panel to load correctly?

Okay. I got. I think.

I changed the media root to:

'media'    => __DIR__ . '/../public/media',

and added the missing mime type declaration in my nginx config:

location ~ \.css {
          add_header  Content-Type    text/css;

      location ~ \.js {
          add_header  Content-Type    application/x-javascript;