Add feed item collection

eleventy.config.js

@@ -89,6 +89,13 @@ module.exports = function (eleventyConfig) {
     /* This is the part that tells 11ty to swap to our custom config */
     eleventyConfig.setLibrary("md", markdownLibrary);
 
+    // Add contents to a feed items collection
+    eleventyConfig.addCollection("feedItems", function (collectionApi) {
+        return collectionApi.getFilteredByTags(
+            'articles', 'posts', 'changelogs'
+        );
+    });
+
     // Add content categories to a collection
     eleventyConfig.addCollection("categories", function(collectionApi) {
         let categories = new Set();