Exclude package-lock.json from jekyll build

_config.yml

@@ -19,7 +19,7 @@ baseurl: "/just-the-docs/" # the subpath of your site, e.g. /blog
 # url: "" # the base hostname & protocol for your site, e.g. http://example.com
 
 permalink: pretty
-exclude: ["node_modules/", "*.gemspec", "*.gem", "Gemfile", "Gemfile.lock", "package.json", "script/", "LICENSE.txt", "lib/", "bin/", "README.md", "Rakefile"]
+exclude: ["node_modules/", "*.gemspec", "*.gem", "Gemfile", "Gemfile.lock", "package.json", "package-lock.json",  "script/", "LICENSE.txt", "lib/", "bin/", "README.md", "Rakefile"]
 
 # Enable or disable the site search
 search_enabled: true