Prepare image. This needs to be done once.

1. Run docker: make build_image

Run the image in a container and build stuff:

1. Run docker: make builder
2. Prepare aspan.js from Aspan library and put into static/src/javascripts/lib/aspan.js
3. Build: ./build_web.sh
4. Find build output inside dist.

Set variable: export NODE_ENV=development

After that tailwind classes won't be purged and correspondingly CSS files are going to be much larger, like over 1 MB. But it allows to experiment with classes without rebuild.