glee now supports uploading images into your ghost database instead of AWS S3. Please check the Image backend Configuration[1] section in glee readme.

[1]:https://github.com/HexmosTech/glee#image-storage-backend-con...

This tool was built a year or so ago, when Ghost lacked a sophisticated image API (IIRC). Just checked now, there seems to be a solid API for managing images. Stay tuned to the repo, will try to add support to this.

Meanwhile, one could always directly link image URLs (say from Google Drive).