og:image meta tag doesn't carry the scheme

[usamah82]

Most probably a quick fix, but I didn't have time to create a PR.

Basically at:

lines-engine/app/controllers/lines/articles_controller.rb

Line 59 in b1fcdcf

meta_tags[:image] = CONFIG[:host] + @article.image_url if @article.image_url.present?

meta_tags[:image] = CONFIG[:host] + @article.image_url if @article.image_url.present?

causes the og:image meta tag to not carry the scheme (http vs https), making FB scraper complain of mixed scheme / content issue.