trying atom feed

Gemfile

@@ -5,6 +5,6 @@ gem 'jekyll', '4.1.1'
 group :jekyll_plugins do
   gem 'jekyll-sitemap', '1.4.0'
   gem 'jekyll-last-modified-at','1.1.0'
-  gem 'jekyll-feed', '0.15.1'
+  # gem 'jekyll-feed', '0.15.1'
   # gem 'jekyll-pwa-plugin'
 end

_config.yml

@@ -127,7 +127,7 @@ defaults:
           resize_style: cover
           uploads_dir: "/images/posts"
 
-feed:
-  path: rss.xml
-  posts_limit: 10
-  excerpt_only: true
+# feed:
+#   path: rss.xml
+#   posts_limit: 10
+#   excerpt_only: true

atom.xml

@@ -0,0 +1,25 @@
+---
+layout: nil
+---
+<?xml version="1.0" encoding="utf-8"?>
+<feed xmlns="http://www.w3.org/2005/Atom">
+  <title type="text" xml:lang="en">{{ site.title }}</title>
+  <link type="application/atom+xml" href="{{ site.url }}/feed.xml" rel="self"/>
+  <link type="text/html" href="{{ site.url }}/" rel="alternate"/>
+  <updated>{{ site.time | date_to_xmlschema }}</updated>
+  <id>{{ site.url }}/feed.xml</id>
+  <author>
+    <name>{{ site.publisher.name }}</name>
+  </author>
+  <rights>Copyleft {{ site.time | date: '%Y' }} {{ site.publisher.name }}</rights>
+
+  {% for post in site.posts limit:20 %}
+  <entry>
+    <title>{{ post.title }}</title>
+    <link href="{{ site.url }}{{ post.url }}"/>
+    <updated>{{ post.date | date_to_xmlschema }}</updated>
+    <id>home_url{{ post.id }}</id>
+    <content type="html">{{ post.content | xml_escape }}</content>
+  </entry>
+  {% endfor %}
+</feed>