Change get articles to read from database instead of dummy data.

src/reader/structs/feed.rs

@@ -3,7 +3,7 @@ use serde::Serialize;
 use super::article::Article;
 
 #[derive(Serialize)]
-pub struct Feed {
+pub struct FeedAggregate {
     pub title: String,
     pub items: Vec<Article>,
 }