feat: set up banner for shutdown

Gemfile

@@ -15,3 +15,5 @@ group :jekyll_plugins do
   gem "jekyll-include-cache"
   gem "jekyll-algolia"
 end
+
+gem "webrick", "~> 1.9"

_includes/shutdown_banner.html

@@ -0,0 +1,8 @@
+<link rel="stylesheet" href="{{ '/assets/css/main2.css' | relative_url }}">
+<link rel="stylesheet" href="{{ '/assets/css/custom.css' | relative_url }}">
+
+<div class="shutdown-banner">
+   <p>Due to a lapse in government funding, the information on this website may not be up to date, transactions submitted via the website may not be processed, and the agency may not be able to respond to inquiries until appropriations are enacted.</p>
+   <p>The NIH Clinical Center (the research hospital of NIH) is open. For more details about its operating status, please visit <a href="http://cc.nih.gov">http://cc.nih.gov.</a></p>
+   <p> Updates regarding government operating status and resumption of normal operations can be found at <a href="http://USA.gov">http://USA.gov.</a></p>
+   </div>

assets/css/custom.css

@@ -232,3 +232,12 @@ gap:20px;
   margin-bottom: 0em;
 }
 
+.shutdown-banner{
+  text-align: center; 
+  font-weight:bold; 
+  padding: 20px 20px;
+  margin:10px;
+  background-color: rgb(161, 199, 225);
+  box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); /* Optional shadow for depth */
+}
+