synology wordpress setup error

[chqzeng]

Hi all, very new to this topic and try to follow the steps here to setup a wordpress on SYNOLOGY.
what I have done:

• setup hardware (DS1520+), install docker (now container manager), install docker compose, SSH , file permission to user, and firewall allow ports
• git clone this project into my docker folder: /volume2/docker/docker-traefik, modify the .env with values:

PUID=1026
PGID=100
TZ=America/New York
USERDIR=/volume2/homes/LocalUser
DOCKERDIR=/volume2/docker/docker-traefik
SECRETSDIR=/volume2/docker/docker-traefik/secrets
SERVER_IP=
PIHOLE_IP=
LOCAL_NETWORK=
LOCAL_IPS=127.0.0.1/32,10.0.0.0/8,192.168.0.0/16,172.16.0.0/12

• direct run: sudo docker-compose -f ./docker-compose-t2-synology.yml up -d , failed with many errors;
• shorten the docker-compose-t2-synology.yml file, only keep

network: 
     .... all default values ....
service: 
   traefik:
     .... default value remove secret ...
    ...(default ports) ...
    ports:
      - target: 80
        published: 80
        protocol: tcp
        mode: host
      - target: 443
        published: 443
        protocol: tcp
        mode: host
      - target: 8080 # insecure api wont work
        published: 8085
        protocol: tcp
        mode: host

and re-run: sudo docker-compose -f ./docker-compose-t2-synology.yml up -d , with output:

WARN[0000] The "DOMAINNAME_HOME_SYNOLOGY" variable is not set. Defaulting to a blank string. 
WARN[0000] The "DOMAINNAME_HOME_SYNOLOGY" variable is not set. Defaulting to a blank string. 
WARN[0000] The "DOMAINNAME_HOME_SYNOLOGY" variable is not set. Defaulting to a blank string. 
[+] Building 0.0s (0/0)                                                                                                                                                                             docker:default
[+] Running 4/4
 ✔ Network socket_proxy    Created                                                                                                                                                                            0.1s 
 ✔ Network t2_proxy        Created                                                                                                                                                                            0.1s 
 ✔ Container socket-proxy  Started                                                                                                                                                                            0.0s 
 ✔ Container traefik       Created                                                                                                                                                                            0.0s 
Error response from daemon: driver failed programming external connectivity on endpoint traefik (44a534cb26099780ae5663e31f2840fe12280f1ba0f357bb5748d0aa52010f04): Error starting userland proxy: listen tcp4 0.0.0.0:443: bind: address already in use

and here is the log file, when run : sudo docker-compose -f ./docker-compose-t2-synology.yml logs

WARN[0000] The "DOMAINNAME_HOME_SYNOLOGY" variable is not set. Defaulting to a blank string. 
WARN[0000] The "DOMAINNAME_HOME_SYNOLOGY" variable is not set. Defaulting to a blank string. 
WARN[0000] The "DOMAINNAME_HOME_SYNOLOGY" variable is not set. Defaulting to a blank string. 
socket-proxy  | [WARNING] 301/022402 (1) : Can't open server state file '/var/lib/haproxy/server-state': No such file or directory
socket-proxy  | Proxy dockerbackend started.
socket-proxy  | Proxy dockerfrontend started.
socket-proxy  | [NOTICE] 301/022402 (1) : New worker #1 (7) forked

---

here are questions:

• what is the meaning of this "bind: address already in use" error?
• what IP access:port do I need to access the wordpress page from my local machine (not within synology where there is no browser)?
• do I need to setup this "DOMAINNAME_HOME_SYNOLOGY" ? I plan to migrate my wordpress from a cloud host (xxxx.com)
• what would be the best way to migrate from cloud server to sysnology wordpress?

thank you,