Add open-graph stuff

website/Makefile

@@ -1,5 +1,15 @@
 VERSION?="0.3.22"
 
+build:
+	@echo "==> Starting build in Docker..."
+	@docker run \
+		--interactive \
+		--rm \
+		--tty \
+		--volume "$(shell pwd):/website" \
+		hashicorp/middleman-hashicorp:${VERSION} \
+		bundle exec middleman build --verbose --clean
+
 website:
 	@echo "==> Starting website in Docker..."
 	@docker run \
@@ -11,4 +21,4 @@ website:
 		--volume "$(shell pwd):/website" \
 		hashicorp/middleman-hashicorp:${VERSION}
 
-.PHONY: website
+.PHONY: build website

website/config.rb

@@ -8,6 +8,15 @@ activate :hashicorp do |h|
 end
 
 helpers do
+  # Returns the FQDN of the image URL.
+  #
+  # @param [String] path
+  #
+  # @return [String]
+  def image_url(path)
+    File.join(base_url, image_path(path))
+  end
+
   # Get the title for the page.
   #
   # @param [Middleman::Page] page

website/source/layouts/layout.erb

@@ -14,6 +14,17 @@
     <meta name="msapplication-config" content="/microsoft-tile.xml" />
     <meta name="theme-color" content="#ffffff">
 
+    <meta name="twitter:card" content="summary_large_image" />
+    <meta name="twitter:site" content="@HashiCorp" />
+    <meta name="twitter:creator" content="@HashiCorp" />
+    <meta property="og:url" content="<%= File.join(base_url, current_page.url) %>" />
+    <meta property="og:title" content="<%= title_for(current_page) %>" />
+    <meta property="og:site_name" content="Packer by HashiCorp"/>
+    <meta property="og:image" content="<%= image_url("og-image.png") %>"/>
+    <meta property="og:image:width" content="1200"/>
+    <meta property="og:image:height" content="1200"/>
+    <meta property="og:description" content="<%= description_for(current_page) %>" />
+
     <title><%= title_for(current_page) %></title>
 
     <%= stylesheet_link_tag "application" %>