Facebook share dialog app not set up

[yangshun]

Is this a bug report?

Yes

Have you read the Contributing Guidelines on issues?

Yes

Environment

Docusaurus 1.0.14, Chrome 66

Steps to Reproduce

1. Go to
2. Scroll to the bottom, click on "share"

Expected Behavior

Should show a compose dialog where user can post to Facebook.

Actual Behavior

Error dialog shown.

Reproducible Demo

1. Go to https://docusaurus.io/blog/2018/04/30/How-I-Converted-Profilo-To-Docusaurus.html
2. Click the FB share button at the bottom.

[yangshun]

Fixed by @JoelMarcey !