Problems when using compose way of running

We have monorepo where mini-app folder is for nextjs project and backend is fast-api project we tried to use sing le top level docker-compose but we were getting errors, then we tried to refer separate Dockerfiles inside directories in our top level docker-compose Dockerfiles were using nixpacks, but it was failing cause nixpacks command not found, though on our server we installed nixpacks image and also then tried to install it on our linux os the last try was to run frontend with Dockerfile that uses node image instead of nixpacks but we again got infinite npm install command, it was using some strange node:8 or node:7 and complaining about CommonJs,