How to setup LinkStack with ssl through reverse_proxy with caddy

[giacomolanzi]

Hello,
I am having trouble setting up LinkStack on docker alongside with Caddy for reverse proxy.

Here is my yml:

services:
  caddy:
    image: caddy:latest
    restart: unless-stopped
    container_name: caddy
    ports:
      - "80:80"
      - "443:443"
    volumes:
      - caddy_data:/data
      - ${DATA_FOLDER}/caddy_config:/config
      - ${DATA_FOLDER}/caddy_config/Caddyfile:/etc/caddy/Caddyfile

  n8n:
    image: docker.n8n.io/n8nio/n8n
    container_name: n8n
    restart: always
    environment:
      - N8N_HOST=${N8N_SUBDOMAIN}.${DOMAIN_NAME}
      - N8N_PORT=5678
      - N8N_PROTOCOL=https
      - NODE_ENV=production
      - WEBHOOK_URL=https://${N8N_SUBDOMAIN}.${DOMAIN_NAME}/
      - GENERIC_TIMEZONE=${GENERIC_TIMEZONE}
      - N8N_LOG_OUTPUT=console
      - N8N_LOG_LEVEL=debug
    volumes:
      - n8n_data:/home/node/.n8n
      - ${DATA_FOLDER}/local_files:/files

  portainer:
    image: portainer/portainer-ce:latest
    container_name: portainer
    ports:
      - "9000:9000"
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - portainer_data:/data
    restart: unless-stopped

  linkstack:
    container_name: linkstack
    hostname: linkstack
    environment:
      - HTTP_SERVER_NAME=links.***.it
      - HTTPS_SERVER_NAME=links.***.it
      - TZ=Europe/Rome
      - PHP_MEMORY_LIMIT=512M
      - UPLOAD_MAX_FILESIZE=8M
    ports:
      - "8190:443"
    restart: unless-stopped
    volumes:
      - linkstack:/htdocs
    image: linkstackorg/linkstack:latest

volumes:
  caddy_data:
    external: true
  n8n_data:
    external: true
  portainer_data:
  linkstack:
    external: true

To be noted: I edited the HTTP_SERVER_NAME and HTTPS_SERVER_NAME using the third level domain I would like to use to navigate to LinkStack.
Since ports 80/443 are used by caddy, I assigned 8190:443.

Here is my Caddy Config section related to LinkStack:

links.***.it {
  reverse_proxy linkstack:8190 {
    transport http {
      tls_insecure_skip_verify
    }
  }
}

What I am doing wrong?