update .env

Запрос на слияние 'new_branch' (#1) из new_branch в master

create README.md

delete demo/s

upload files

create demo/s

create README.md

upload files

create dev/requirements.txt

delete dev/solution.py

delete dev/requirements.txt

delete demo/s

upload files

create demo/s

delete demo

create demo

upload files

create dev/requirements.txt

delete dev/solution.py