How to install Jekyll on Windows?

Question

Windows

Tell me how to install Jekyll on windows.
I'm trying this instruction: https://jekyllrb.com/docs/windows/#installation
Everything seems to be simple. Only three steps, but at the last step, when I put Jekyll - an error. Something about a certificate like.
Screenshot of the error:

Answer 1

gem -vhere it is necessary and without a space between the dash and v
do you have node.js installed?

Answer 2

The issue was resolved.
This video solves the certificate error when installing Jekyll on Windows :
https://www.youtube.com/watch?v=xrxY5h906iI
This error is meant:
ERROR: Could not find a valid gem 'jekyll' (>= 0), here is why:
Unable to download data from https://rubygems.org/ - SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed