Document server is using the wrong port when following official instructions

[bohwaz]

This issue is unique.

• I have used the search tool and did not find an issue describing my bug.

Operating System of DocumentServer

Docker

Version information

latest (011630116202)

Expected Behavior

Starting docker container on a different port than 80, example should work.

Actual Behavior

Example editor does not work at all.

Reproduction Steps

1. follow instructions from official doc: https://helpcenter.onlyoffice.com/installation/docs-community-install-docker.aspx?_ga=2.51711023.782359554.1594636128-1157782750.1587541027
2. change port number, as instructed: docker run -i -t -d -p 8083:80 --restart=always -e JWT_SECRET=my_jwt_secret onlyoffice/documentserver
3. install example as instructed: docker exec XXXX sudo supervisorctl start ds:example
4. open example editor and create new document, be faced with the UI loaded but an error message:

Additional information

The documentserver log file shows the issue: it is trying to make an internal request on port 8083 (public facing port), when it is internally using port 80:

Error 
[ERROR] [localhost] [172.17.0.1new.xlsx1726236365762] [uid-1] nodeJS - postData error: url = http://localhost:8083/example/track?filename=new.xlsx&useraddress=172.17.0.1;data = {"key":"172.17.0.1new.xlsx1726236365762","status":1,"users":["uid-1"],"actions":[{"type":1,"userid":"uid-1"}],"token":"eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJrZXkiOiIxNzIuMTcuMC4xbmV3Lnhsc3gxNzI2MjM2MzY1NzYyIiwic3RhdHVzIjoxLCJ1c2VycyI6WyJ1aWQtMSJdLCJhY3Rpb25zIjpbeyJ0eXBlIjoxLCJ1c2VyaWQiOiJ1aWQtMSJ9XSwiaWF0IjoxNzI2MjM2MzY2LCJleHAiOjE3MjYyMzY2NjZ9.PLxes5qAaTcYZLSzPbMdBp7K63Pi3RcAMqnDNhJMSPs"} Error: connect ECONNREFUSED 127.0.0.1:8083
    at TCPConnectWrap.afterConnect [as oncomplete] (node:net:1187:16)

As seen in #1819 you can get around this by using the public network IP of the machine instead of localhost, but this is not a solution, just a workaround, and it won't work when you have a firewall in place. The document server should not do requests to the outside for its internal needs.

Also the documentation should not point to something that does not work.

[bohwaz]

Changing the port in nginx ds.conf makes it working correctly, so there is something missing in documentserver code to use the correct host in URLs.