TODO
- [ ] Display chords according to sounds or lyrics.
- [x] lyrics.
- [ ] sounds.
- [ ] Add chord ([chord.json](https://github.com/iwasakishuto/PyGuitar/blob/master/guitar/data/chord.json))
- [x] Automatically generate a chordbook by scraping from [U-FRET](https://www.ufret.jp/).
- [x] Create `Dockerfile`. (Connecting with headless chrome driver)
- [x] Formatted a chordbook.
- [x] Add command like a command line tools in `Makefile`. **(new!!✨)**
- [x] Add data file in packages. **(new!!✨)**
- [x] Adjust chordbook size to A4. **(new!!✨)**