Filestash reverse proxy with caddy

EDIT: found the culprit. It was cloudflare's Brotli compression. Everything's working fine now after disabling it. For those who are wondering, it's under Speed>optimization>content-optimization in the CF dashboard.

Hi,

For those who are using FIlestash, I am trying to configure Filestash behind a subdomain with caddy, but I keep getting stuck at the nyan cat loading screen. I can access the app via IP:port without any problem so I am guessing the problem lies in the reverse proxy configuration.

I've tried changing the hostname to my domain in the app (settings>general), tried adding various header directives to the Caddyfile to no avail.

Filestash container logs output:

filestash  | 2023/08/14 12:04:18 SYST INFO Filestash v0.5 starting
filestash  | 2023/08/14 12:04:18 SYST INFO [http] starting ...
filestash  | 2023/08/14 12:04:19 SYST INFO [http] listening on :8334
filestash  | 2023/08/14 12:04:25 HTTP 200 GET    0.2ms /admin/setup
filestash  | 2023/08/14 12:04:26 HTTP 401 GET    0.1ms /api/session
filestash  | 2023/08/14 12:04:26 HTTP 200 GET    0.7ms /api/config

Caddyfile

stash.mydomain.com {
        reverse_proxy filestash:8334 {
}         
}

docker-compose.yml

version: '2'
services:
  app:
    container_name: filestash
    image: machines/filestash
    restart: always
    environment:
    - APPLICATION_URL=https://stash.mydomain.com
networks:
  default:
    external:
      name: caddy

Any help would be appreciated.