If you want to enable the V8JS Support in ACP go to doc/Docker.
# cd /var/www/acp-1.0.3/doc/Dockerdocker-php-v8js/
# sudo ./buildinstall_v8js.php
The script will download the necessary packages then will build and run a docker container which have php-v8js enabled.
The last thing that must be done is few lines of code inside your Apache2 vhost configuration: