Heroku example is broken

[goldstar611]

The online examples that use heroku are broken due to CORS. Here's what the javascript console says in my browser:

soulheart.js:18 GET https://sh-example-arbitrary.herokuapp.com/ net::ERR_FAILED
(anonymous) @ soulheart.js:18
(anonymous) @ soulheart.js:64
sethherr.github.io/:1 Access to XMLHttpRequest at 'https://sh-example-simple.herokuapp.com/?per_page=10' from origin 'https://sethherr.github.io' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
jquery.js:8630 GET https://sh-example-simple.herokuapp.com/?per_page=10 net::ERR_FAILED