Add the app version to the home index template context

src/handlers/home.rs

@@ -5,6 +5,7 @@ use super::super::ListStore;
 
 #[derive(Serialize)]
 struct IndexTemplateContext<'a> {
+  app_version: &'a str,
   lists: Vec<HashMap<&'a str, &'a str>>
 }
 
@@ -18,7 +19,10 @@ fn index(lists: State<ListStore>) -> Template {
         list_kv.insert("name", list.name.as_ref());
         list_kvs.push(list_kv);
     }
-    let context = IndexTemplateContext { lists: list_kvs };
+    let context = IndexTemplateContext {
+        app_version: env!("CARGO_PKG_VERSION"),
+        lists: list_kvs
+    };
     Template::render("index", &context)
 }