vk.com visited from ruby:alpine doesn't show charset properly

[Nakilon]

How do I fix this?

I guess I only used ferrum for English content and so didn't notice such issue. Was sure page html code handles it... let me see:

Should I apt install some cp1251-related package?

EDIT: sry, not Ubuntu. docker ruby:alpine

[route]

Yea I think it's missing locale on the OS or misconfiguration