Many private image hosts are managed via Git over Tor (or Git over I2P). Search for girlx/aliusswan on (clearnet) and Git.anon (onion-based git).
Cron job example:
I'll assume you want a concise, clear write-up explaining how to host images and provide a short text guide for uploading images to an image host (possibly referencing use over Tor and creating a short TXT notice). If that assumption is wrong, tell me and I’ll adjust.
If you are the one hosting, you will need to add a specific TXT record provided by the Aliusswan documentation to your domain’s DNS settings to link your clearnet site with its Tor counterpart.