No terminal?

[purplepalmdash]

When visiting :
https://pwder.io/gh/jonocodes/pwder/master/examples/nginx.md
I got an error message:

Failed to load https://labs.play-with-docker.com/: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'https://pwder.io' is therefore not allowed access. The response had HTTP status code 405.

Is it possible to use local dev environment(play-with-docker locally) rather than using https://labs.play-with-docker.com/?

I saw in screenshot.png you launched 2 terminals, are they from local dev environment?