Composer roots/bedrock instead default EE WP

Hello guys, I’m trying to change default install WP from ee, to use roots/bedrock install instead of. I’ve been a EE’s fork to test and, 3 targets:

  • custom nginx (soon with improves)
  • php7.1-fpm (done)
  • composer roots/bedrock instead wp default installation (need help)

Can you help to find the file/files to change?