Develop Plesk Extension with elm

How to start

1. Add extension's stub as usual
2. Go to the project dir: cd <ext-dir>
3. Add elm to the project: yarn add elm --dev
4. Init elm project: yarn run elm init
5. Create the directory for elm sources: mkdir src/forntend
6. Open elm.json and edit "source-directories" value to point to new frontend dir
7. Take a sample: https://guide.elm-lang.org
8. Make command to check Elm w/o Plesk integration: yarn run elm make src/frontend/Main.elm --output=src/htdocs/js/main.js