To convert a Google Doc to website by chapter, convert to ePub and unzip

Helpful trick for the days when you need to put each chapter on a separate page and still have a working Table of Contents & preserve links to images.

The key idea is that epub is simply a zipped static website.

It's like 3 lines of bash:

```bash pandoc -s "$FILE" -t epub --epub-chapter-level=2 -o all.epub unzip -q "all.epub" -d . && rm "all.epub" mv EPUB/nav.xhtml EPUB/index.html ```