docs: Remove dead links in docs and improve SOP Class Handler docs (#1593)

* fix docs dead links

* add examples to SOP handler docs

docs/latest/development/contributing.md

@@ -114,8 +114,8 @@ the tips above will help ensure your changes are reviewed.
 
 ## Testing contribution pull requests
 
-OHIF uses [netlify](netlify.com) so that pull requests are autogenerated and
-available for testing.
+OHIF uses [netlify](https://www.netlify.com/) so that pull requests are
+autogenerated and available for testing.
 
 For example, [this url][example-url] allows you to test [pull request 237, the
 request that created this FAQ entry,][pr-237] using data pulled from Amazon S3.