To display pop-up windows for calls and correct working of the Asterisk and Starface VoIP extensions in the Docker instance, you need to insert an additional line into the crontab, depending on which VoIP extension you are using.
WEBSERVER_USER can be one of the following: “www”, “www-data”, “apache”, etc (depends on your web-server).
This line should be added under root or other docker user.
* * * * * /usr/bin/docker exec --user WEBSERVER_USER -i ESPOCRM_DOCKER-CONTAINER /bin/bash -c "cd /var/www/html; php -f command.php voip Asterisk" > /dev/null 2>&1