support for closing the homepage banner

views/index.pug

@@ -7,8 +7,8 @@ block content
 	h1(class="h2") #{coinConfig.siteTitle}
 	hr
 
-	if (config.demoSite)
-		div(class="alert alert-primary", role="alert")
+	if (config.demoSite && session.hideHomepageBanner != "true")
+		div(class="alert alert-primary alert-dismissible", role="alert")
 			p
 				strong #{coinConfig.siteTitle}
 				span  is 
@@ -25,6 +25,9 @@ block content
 				span    
 				a(class="github-button", href="https://github.com/janoside/btc-rpc-explorer/fork", data-icon="octicon-repo-forked", data-size="large", data-show-count="true", aria-label="Fork janoside/btc-rpc-explorer on GitHub") Fork
 
+			a(href="/changeSetting?name=hideHomepageBanner&value=true", class="close", aria-label="Close", style="text-decoration: none;")
+				span(aria-hidden="true") ×
+
 	
 	if (latestBlocks)
 		div(class="row mt-4")