[2.x] [API stack] Fix docker-compose.yml ports for Sail installations

[josephmiclaus]

When installing Breeze with API stack in a Laravel Sail project, update docker-compose.yml accordingly:

• Update default APP_PORT
• Remove VITE_PORT, as Vite not used in the API stack

Before:

        ports:
            - '${APP_PORT:-80}:80'
            - '${VITE_PORT:-5173}:${VITE_PORT:-5173}'

After:

        ports:
            - '${APP_PORT:-8000}:80'

Note: changes are only applied if docker-compose.yml exists.