docker-compose.vite.yaml

# Override the web container's standard HTTP_EXPOSE and HTTPS_EXPOSE services
# to expose port `3000` of DDEV's web container.
version: '3.6'
services:
  web:
    expose:
      - '3000'
    environment:
      - HTTP_EXPOSE=${DDEV_ROUTER_HTTP_PORT}:80,${DDEV_MAILPIT_PORT}:8025,3001:3000
      - HTTPS_EXPOSE=${DDEV_ROUTER_HTTPS_PORT}:80,${DDEV_MAILPIT_HTTPS_PORT}:8025,3000:3000

@ryanirelan: typo in the file name in docker-composer.vite.yaml, should be docker-compose.vite.yaml

Thank you, fixed!

It's a typo easy to make as a PHP dev :-)