Add meta description for templates home page

services/web/app/views/templates/index.jade

@@ -1,5 +1,8 @@
 extends ../layout
 
+block vars
+	- var meta = "Over 400 LaTeX templates for journal articles, theses, CV and resumes, posters, presentations, and much more"
+
 block content
 	.content.content-alt
 		.container