Since the official post scheduler at https://www.scheduler.mastodon.tools/ doesn't support images, I needed to make a simple post scheduler for my own purposes.
So here it is. A simple post scheduler running fully client-side.
The tech is Typescript + Vue.js, supported by masto.js library.
To build run: npm run build
To run a local webserver: npm run preview