Nextcloud+docker+onlyoffice

[casuza]

I have the nextcloud configured and functional that can be accessed: https://nuvempmc.castelo.es.gov.br/login.
I would like to run the onlyoffice, I already have a contanier of the docker running, with the ps command docker view:

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
ef85c6b32e23 onlyoffice / documentserver "/ bin / sh -c 'bash ..." 24 minutes ago Up 24 minutes 80 / tcp, 0.0.0.0:448->443/tcp distracted_williams

I already cloned the onlyoffice with the command:
git clone https://github.com/ONLYOFFICE/onlyoffice-owncloud.git onlyoffice

however for some reason I would like the help of the gentlemen, I can not run the onlyoffice. When I try to call the API with the command:
https://nuvempmc.castelo.es.gov.br:448/ ... nts/api.js

I receive the following message:

Can not access this site
The web page at https://nuvempmc.castelo.es.gov.br:448/ ... nts/api.js may be temporarily unavailable or may have been moved permanently to a new web address .
ERR_TUNNEL_CONNECTION_FAILED


sorry if I am not observing some detail because I am new to nextcloud, apologies for the English, because I am Brazilian and I use the google translator.