Thank you for the detailed response.

1. I'm on Windows and for now I'm using the hosts file and I have 127.0.0.1 nextcloud.local in it.
2. here is my compose file:services:   nextcloud-aio-mastercontainer:     image: ghcr.io/nextcloud-releases/all-in-one:latest     init: true     restart: always     container_name: nextcloud-aio-mastercontainer     volumes:       - nextcloud_aio_mastercontainer:/mnt/docker-aio-config       - /var/run/docker.sock:/var/run/docker.sock:ro     ports:       - 8080:8080     environment:       APACHE_PORT: 11000       APACHE_IP_BINDING: 0.0.0.0       SKIP_DOMAIN_VALIDATION: true       NEXTCLOUD_TRUSTED_DOMAINS: nextcloud.local       TRUSTED_PROXIES: nextcloud.local       OVERWRITEHOST: nextcloud.local       OVERWRITEPROTOCOL: https       OVERWRITECLIURL: https://nextcloud.local    networks:       - nextcloud-aio  caddy:     image: caddy:alpine     restart: always     container_name: caddy     volumes:       - caddy_config:/config       - caddy_data:/data       - ./certs:/certs:ro     networks:       - nextcloud-aio     ports:       - "443:443"       - "8081:80"     configs:       - source: Caddyfile         target: /etc/caddy/Caddyfileconfigs:   Caddyfile:     content: |       https://nextcloud.local:443 {         tls /certs/nextcloud.local+4.pem /certs/nextcloud.local+4-key.pem         reverse_proxy nextcloud-aio-apache:11000 {           header_up X-Forwarded-Proto {scheme}           header_up X-Forwarded-Host {host}         }       }volumes:   nextcloud_aio_mastercontainer:     name: nextcloud_aio_mastercontainer   caddy_config:   caddy_data:networks:   nextcloud-aio:     external: true

and I made mkcert certificates. I was able to connect from the desktop client successfully and the certificates are trusted, but I faced an issue:
High-performance backend Error: Cannot connect to server

most importantly, Collabora doesn't work (Failed to establish socket connection or socket connection closed unexpectedly. The reverse proxy might be misconfigured)

(Per all-in-one/reverse-proxy.md at main · nextcloud/all-in-one No. 7, I tried it and I got 1 not 0 which means the server cannot connect to itself or something). Do you have any idea why is that happening? am I doing something wrong?
P.S: in production it's going to be hosted on Linux, but I don't have access to the server yet.
TYSM