How to show a user's country flag in his profile?

[dmitrii_fediuk]

• «National flags indicating home country of each user?»
• «User location’s flags»
• «Showing user location/country when posting?»

An example

meta.discourse.org/t/39109

A ready plugin

• «National Flags - Display user nationality in Discourse»
• github.com/Ebsy/discourse-nationalflags