I'm just getting a blank page

[diecknet]

Hi,
I wanted to try out VoidAuth, but I'm just getting a blank page.
If I try to access via Caddy as a reverse proxy there is no HTTP Body returned. If I try to access VoidAuth directly via port 3000, I do get a HTTP response with body content, but nothing is rendered in the browser (tried Firefox and Chrome). I'm pretty sure that I'm doing something horribly wrong, so I did not open this as an issue^^ I thought that it might be something with my docker networks, but I also tried adding the VoidAuth container to my caddy_network initially, but had the same issues there. I have no issues with other containers that are reverse proxied via Caddy, but I can't rule out that it's something with my Caddy config. Some things that I tried/verified for troubleshooting:

• Tested: Caddy container can reach VoidAuth container and retrieve the HTTP response (used wget) => result looks similar to what I get via port 3000 in the browser)
• Set the APP_URL to http://auth.demotenant.de:3000 and access VoidAuth via plaintext HTTP on port 3000 => still nothing rendered in the browser
• Enabled Debug via ENABLE_DEBUG=true but I don't see any additional info in the logs
• Changed the secrets for DB_PASSWORD and STORAGE_KEY
• Checked the logs, but there is basically nothing

If anyone has any ideas or suggestions please let me know, highly appreciated :) VoidAuth looks really cool and I would love to use it on my homeserver.

Here is my config (removed some infos which is related to other containers and docker networks):

compose.yaml

services:
  caddy:
      build: ./caddy-dockerfile
      container_name: caddy
      restart: unless-stopped
      ports:
        - 80:80
        - 443:443
      volumes:
        - /mnt/user/appdata/komodo/periphery/repos/homeserver/reverseproxy/Caddyfile:/etc/caddy/Caddyfile # komodo pulls the Caddyfile from the Git repo to this path
        - /mnt/user/appdata/caddy/data:/data
        - /mnt/user/appdata/caddy/config:/config
      networks:
        - caddy_network
        - voidauth_network
      user: "99:100" # uid 99 = nobody, gid 100 = users

  voidauth: 
    image: ghcr.io/voidauth/voidauth:1.8.1@sha256:bd46803bca036850fc80eb89982b8d69dddf7f50d4a06d64f990d0eee9055ec1
    restart: unless-stopped
    volumes:
      - /mnt/user/appdata/voidauth/config:/app/config
    ports:
      - "3000:3000"
    environment:
      - APP_URL=${VOIDAUTH_APP_URL}
      - DB_HOST=voidauth-db
      - DB_PASSWORD=${POSTGRES_PASSWORD}
      - STORAGE_KEY=${VOIDAUTH_STORAGE_KEY}
      - ENABLE_DEBUG=${VOIDAUTH_ENABLE_DEBUG:-false}
    depends_on:
      voidauth-db:
        condition: service_healthy
    networks:
      - voidauth_network
      - voidauth_db_network

  voidauth-db:
    image: postgres:18.1-alpine3.23@sha256:eca6fb2d91fda290eb8cfb8ba53dd0dcbf3508a08011e30adb039ea7c8e1e9f2
    restart: unless-stopped
    environment:
      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD}
    volumes:
      - /mnt/user/appdata/voidauth/db:/var/lib/postgresql/18/docker
    healthcheck:
      test: "pg_isready -U postgres -h localhost"
    networks:
      - voidauth_db_network

networks:
  caddy_network:
    name: "caddy_network"
  voidauth_db_network:
    name: "voidauth_db_network"
  voidauth_network:
    name: "voidauth_network"

Dockerfile for Caddy

FROM caddy:2.11-builder-alpine@sha256:fe361f59fa6340d1e16cc067c0ea10d21fe95dc01dd4f4e87c0e111de069103e AS builder

RUN xcaddy build --with github.com/caddy-dns/desec

FROM caddy:2.11-alpine@sha256:c006ba74d79d94d7464db78a3d2755f6a073c3f65db6da40e35d38e8b5585a33

COPY --from=builder /usr/bin/caddy /usr/bin/caddy

.env file

# for voidauth
VOIDAUTH_STORAGE_KEY="somethingblah32chars" 
VOIDAUTH_APP_URL="https://auth.demotenant.de"
VOIDAUTH_ENABLE_DEBUG=true
# voidauth database
POSTGRES_PASSWORD="somelongpassword"

Caddyfile

{
	acme_ca https://acme-v02.api.letsencrypt.org/directory
	email someblah@example.com
	acme_dns desec { 
		token "$DESEC_API_TOKEN" 
	}
}

*.demotenant.de {

	@voidauth host auth.demotenant.de
	handle @voidauth {
		reverse_proxy http://voidauth:3000
	}

	# Fallback for otherwise unhandled domains
	handle {
		respond "not defined in Caddyfile 🫤"
	}
}

Example responses (screenshots):

Via Caddy

Via port 3000

Logs:

Details

# docker logs reverseproxy-voidauth-1 --tail 20


 __   __ ______   __   _____    ______   __  __   ______  __  __
/\ \ / //\  __ \ /\ \ /\  __ \ /\  __ \ /\ \/\ \ /\__  _\/\ \_\ \
\ \ \ / \ \ \/\ \\ \ \\ \ \/\ \\ \  __ \\ \ \_\ \\/_/\ \/\ \  __ \
 \ \_/   \ \_____\\ \_\\ \_____\\ \_\ \_\\ \_____\  \ \_\ \ \_\ \_\
  \//     \/_____/ \/_/ \/_____/ \/_/\/_/ \/_____/   \/_/  \/_/\/_/

        ## Single Sign-On for Your Self-Hosted Universe ##


Connected to postgres database.
Listening on port: 3000

# docker logs caddy --tail 20
{"level":"info","ts":1767613044.921191,"msg":"shutdown complete","signal":"SIGTERM","exit_code":0}
{"level":"info","ts":1767613046.4688978,"msg":"maxprocs: Leaving GOMAXPROCS=16: CPU quota undefined"}
{"level":"info","ts":1767613046.46891,"msg":"GOMEMLIMIT is updated","GOMEMLIMIT":58626175795,"previous":9223372036854775807}
{"level":"info","ts":1767613046.4689126,"msg":"using config from file","file":"/etc/caddy/Caddyfile"}
{"level":"info","ts":1767613046.4689143,"msg":"adapted config to JSON","adapter":"caddyfile"}
{"level":"warn","ts":1767613046.4689155,"msg":"Caddyfile input is not formatted; run 'caddy fmt --overwrite' to fix inconsistencies","adapter":"caddyfile","file":"/etc/caddy/Caddyfile","line":5}
{"level":"info","ts":1767613046.4737787,"logger":"admin","msg":"admin endpoint started","address":"localhost:2019","enforce_origin":false,"origins":["//localhost:2019","//[::1]:2019","//127.0.0.1:2019"]}
{"level":"info","ts":1767613046.4740286,"logger":"tls.cache.maintenance","msg":"started background certificate maintenance","cache":"0xc00092c780"}
{"level":"info","ts":1767613046.474062,"logger":"http.auto_https","msg":"server is listening only on the HTTPS port but has no TLS connection policies; adding one to enable TLS","server_name":"srv0","https_port":443}
{"level":"info","ts":1767613046.4740753,"logger":"http.auto_https","msg":"enabling automatic HTTP->HTTPS redirects","server_name":"srv0"}
{"level":"info","ts":1767613046.4749587,"logger":"http","msg":"enabling HTTP/3 listener","addr":":443"}
{"level":"info","ts":1767613046.4752686,"logger":"http.log","msg":"server running","name":"srv0","protocols":["h1","h2","h3"]}
{"level":"warn","ts":1767613046.4753132,"logger":"http","msg":"HTTP/2 skipped because it requires TLS","network":"tcp","addr":":80"}
{"level":"warn","ts":1767613046.4753184,"logger":"http","msg":"HTTP/3 skipped because it requires TLS","network":"tcp","addr":":80"}
{"level":"info","ts":1767613046.4753225,"logger":"http.log","msg":"server running","name":"remaining_auto_https_redirects","protocols":["h1","h2","h3"]}
{"level":"info","ts":1767613046.4753268,"logger":"http","msg":"enabling automatic TLS certificate management","domains":["*.hej1.de"]}
{"level":"info","ts":1767613046.477262,"msg":"autosaved config (load with --resume flag)","file":"/config/caddy/autosave.json"}
{"level":"info","ts":1767613046.477267,"msg":"serving initial configuration"}
{"level":"info","ts":1767613046.4786718,"logger":"tls","msg":"storage cleaning happened too recently; skipping for now","storage":"FileStorage:/data/caddy","instance":"6fad5a08-ff47-4658-a95f-3a41a18f52d1","try_again":1767699446.4786708,"try_again_in":86399.999999659}
{"level":"info","ts":1767613046.4789493,"logger":"tls","msg":"finished cleaning storage units"}

# docker logs reverseproxy-voidauth-db-1 --tail 20
2026-01-05 11:37:24.922 UTC [1] LOG:  background worker "logical replication launcher" (PID 67) exited with exit code 1
2026-01-05 11:37:24.923 UTC [62] LOG:  shutting down
2026-01-05 11:37:24.924 UTC [62] LOG:  checkpoint starting: shutdown immediate
2026-01-05 11:37:24.929 UTC [62] LOG:  checkpoint complete: wrote 0 buffers (0.0%), wrote 0 SLRU buffers; 0 WAL file(s) added, 0 removed, 0 recycled; write=0.001 s, sync=0.001 s, total=0.006 s; sync files=0, longest=0.000 s, average=0.000 s; distance=0 kB, estimate=1021 kB; lsn=0/18C83E8, redo lsn=0/18C83E8
2026-01-05 11:37:24.948 UTC [1] LOG:  database system is shut down

PostgreSQL Database directory appears to contain a database; Skipping initialization

2026-01-05 11:37:25.414 UTC [1] LOG:  starting PostgreSQL 18.1 on x86_64-pc-linux-musl, compiled by gcc (Alpine 15.2.0) 15.2.0, 64-bit
2026-01-05 11:37:25.414 UTC [1] LOG:  listening on IPv4 address "0.0.0.0", port 5432
2026-01-05 11:37:25.414 UTC [1] LOG:  listening on IPv6 address "::", port 5432
2026-01-05 11:37:25.416 UTC [1] LOG:  listening on Unix socket "/var/run/postgresql/.s.PGSQL.5432"
2026-01-05 11:37:25.424 UTC [32] LOG:  database system was shut down at 2026-01-05 11:37:24 UTC
2026-01-05 11:37:25.432 UTC [1] LOG:  database system is ready to accept connections
2026-01-05 11:42:25.524 UTC [30] LOG:  checkpoint starting: time
2026-01-05 11:42:25.637 UTC [30] LOG:  checkpoint complete: wrote 1 buffers (0.0%), wrote 3 SLRU buffers; 0 WAL file(s) added, 0 removed, 0 recycled; write=0.102 s, sync=0.004 s, total=0.114 s; sync files=3, longest=0.003 s, average=0.002 s; distance=0 kB, estimate=0 kB; lsn=0/18C8828, redo lsn=0/18C87D0
2026-01-05 12:02:25.874 UTC [30] LOG:  checkpoint starting: time
2026-01-05 12:02:25.985 UTC [30] LOG:  checkpoint complete: wrote 1 buffers (0.0%), wrote 1 SLRU buffers; 0 WAL file(s) added, 0 removed, 0 recycled; write=0.102 s, sync=0.002 s, total=0.112 s; sync files=2, longest=0.001 s, average=0.001 s; distance=1 kB, estimate=1 kB; lsn=0/18C8D30, redo lsn=0/18C8CD8
2026-01-05 12:12:26.185 UTC [30] LOG:  checkpoint starting: time
2026-01-05 12:12:26.298 UTC [30] LOG:  checkpoint complete: wrote 1 buffers (0.0%), wrote 1 SLRU buffers; 0 WAL file(s) added, 0 removed, 0 recycled; write=0.102 s, sync=0.003 s, total=0.113 s; sync files=2, longest=0.003 s, average=0.002 s; distance=1 kB, estimate=1 kB; lsn=0/18C91D8, redo lsn=0/18C9180

[diecknet]

Alright LOL I found the issue and it's not visible here in my provided configs: The exact host directive above VoidAuth in my Caddyfile had no closing bracket }. I better not publicly disclose how long that took me to find out