add feed

Gemfile

@@ -4,4 +4,5 @@ gem 'jekyll', '~> 4.0'
 
 group :jekyll_plugins do
   gem 'jekyll_picture_tag', '~> 2.0'
-  end
+  gem 'jekyll-feed'
+end

Gemfile.lock

@@ -30,6 +30,8 @@ GEM
       safe_yaml (~> 1.0)
       terminal-table (>= 1.8, < 4.0)
       webrick (~> 1.7)
+    jekyll-feed (0.17.0)
+      jekyll (>= 3.7, < 5.0)
     jekyll-sass-converter (2.2.0)
       sassc (> 2.0.1, < 3.0)
     jekyll-watch (2.2.1)
@@ -78,6 +80,7 @@ PLATFORMS
 
 DEPENDENCIES
   jekyll (~> 4.0)
+  jekyll-feed
   jekyll_picture_tag (~> 2.0)
 
 BUNDLED WITH

_config.yml

@@ -6,5 +6,8 @@ show_dir_listing: true
 
 safe: false
 
+plugins:
+  - jekyll-feed
+
 picture:
   source: "pictures/"