$ git clone https://github.com/Gu-Parlandim/visitsCount
$ cd visitsCount
$ yarn install
$ yarn start
to use mongodb, you need to specify the environment variable DB_URL
# eg:
export DB_URL=mongodb+srv://account:passwd@***.***.***.mongodb.net/db_count
DB_URL="mongodb+srv://account:passwd@***.***.***.mongodb.net/db_count"