Looks pretty cool. A few things that might be useful (at least for me personally):
- Docker image
- Ability to submit epub from the web interface.
- A calibre plugin to submit directly from there (extension to the above).
- Koreader plugin to download the dictionaries and/or submit books directly from reader.
- Also tracking spoilers but not including them in the dict until you've moved on to the next book. As someone with ADHD and a poor memory this would be really useful.
- To support the above it may also be useful to track the series and/or universe to support creating a dictionary for each; assuming someone may read more than one book at a time or temporarily move on to another without finishing.