[BUG] Bookstack redirects to weird url, page broken

[Elekam]

Is there an existing issue for this?

• I have searched the existing issues

Current Behavior

When trying to access bookstack through bookstack.my-domain with my reverse proxy, I get a connection failed page.

When trying to access bookstack directly with server-ip:6875, I get a broken page like shown in the screenshots.
The url then changes to http://server-ip:6875/bookstack.my-domain/bookstack.my-domain/login.
When trying to press any of the buttons shown in the screenshot, nothing happens.
When changing the APP_URL to my server-ip, the same behaviour occurs except bookstack.my-domain is replaced with the server-ip.

Expected Behaviour

Accessing bookstack through bookstack.my-domain shows me the homepage of bookstack.

Steps To Reproduce

1. Using the latest bookstack-image
2. Using the given docker-compose
3. Run

Environment

- OS: Synology NAS 920+, Linux 4.4.180+

CPU architecture

x86-64

Docker creation

version: "2"
services:
  bookstack:
    image: lscr.io/linuxserver/bookstack
    container_name: bookstack
    environment:
      - PUID=1028
      - PGID=1028
      - APP_URL=bookstack.my-domain
      - DB_HOST=bookstack_db
      - DB_PORT=3306
      - DB_USER=bookstack
      - DB_PASS=password
      - DB_DATABASE=bookstackapp
    volumes:
      - /volume1/docker/bookstack/bookstack_app_data:/config
    ports:
      - 6875:80
    restart: unless-stopped
    depends_on:
      - bookstack_db

  bookstack_db:
    image: lscr.io/linuxserver/mariadb
    container_name: bookstack_db
    environment:
      - PUID=0
      - PGID=0
      - MYSQL_ROOT_PASSWORD=password
      - TZ=Europe/Berlin
      - MYSQL_DATABASE=bookstackapp
      - MYSQL_USER=bookstack
      - MYSQL_PASSWORD=password
    volumes:
      - /volume1/docker/bookstack/bookstack_db_data:/config
    restart: unless-stopped

Container logs

[migrations] started
[migrations] 01-nginx-site-confs-default: skipped
[migrations] 02-default-location: skipped
[migrations] done
───────────────────────────────────────
      ██╗     ███████╗██╗ ██████╗ 
      ██║     ██╔════╝██║██╔═══██╗
      ██║     ███████╗██║██║   ██║
      ██║     ╚════██║██║██║   ██║
      ███████╗███████║██║╚██████╔╝
      ╚══════╝╚══════╝╚═╝ ╚═════╝ 
   Brought to you by linuxserver.io
───────────────────────────────────────
To support LSIO projects visit:
https://www.linuxserver.io/donate/
───────────────────────────────────────
GID/UID
───────────────────────────────────────
User UID:    1028
User GID:    1028
───────────────────────────────────────
using keys found in /config/keys
App Key found - setting variable for seds
Running config - DB_HOST set
**** APP_URL in /config/www/.env is being updated from 10.0.50.50:6875 to bookstack.k-server.me ****
**** If this is an existing install, you should run the following line from your host terminal to update the database URL entries: ****
************************************************************************
docker exec -it bookstack php /app/www/artisan bookstack:update-url 10.0.50.50:6875 bookstack.k-server.me
************************************************************************
Waiting for DB to be available
   INFO  Nothing to migrate.  
[custom-init] No custom files found, skipping...
[ls.io-init] done.


BOOKSTACK-DB:
[migrations] started
[migrations] no migrations found
───────────────────────────────────────
      ██╗     ███████╗██╗ ██████╗ 
      ██║     ██╔════╝██║██╔═══██╗
      ██║     ███████╗██║██║   ██║
      ██║     ╚════██║██║██║   ██║
      ███████╗███████║██║╚██████╔╝
      ╚══════╝╚══════╝╚═╝ ╚═════╝ 
cp: not replacing '/config/custom.cnf'
   Brought to you by linuxserver.io
───────────────────────────────────────
To support LSIO projects visit:
https://www.linuxserver.io/donate/
───────────────────────────────────────
GID/UID
───────────────────────────────────────
User UID:    0
User GID:    0
───────────────────────────────────────
[custom-init] No custom files found, skipping...
230613 15:43:56 mysqld_safe Logging to '/config/databases/56e475316dfb.err'.
230613 15:43:56 mysqld_safe Starting mariadbd daemon with databases from /config/databases
[ls.io-init] done.

[github-actions]

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[aptalca]

Did you do what it says in the log?

[Elekam]

If you mean the migrating from existing install thing, no, because this is a fresh install anyways which I just restarted multiple times to test whats going wrong.

I made 2 mistakes.
First, I forgot to enable the SSL Certificate for the redirection to bookstack.my-domain in Nginx Proxy Manager. Second, I gave the domain without https:// at first.

That caused bookstack to try to redirect me multiple times I guess.
So even when i gave my domain with https://, I would get an error aswell because of the missing certificate.

Amateur mistakes, sorry to bother you all :)