Adding GitHub pages comment system with utteranc

Add comments area into jekyll blog. Use utterance comments opensource.

Refs

Pros

• We can maintain previous comments, because it’s based on GitHub Issue
• Very simple

Apply 101

Just follow above screenshot

repo use as owner/repo style

Blog Post ↔️ Issue Mapping item just follow up your platform

Finally press copy then,

<script src="https://utteranc.es/client.js"
        repo="semonec/blog-comment"
        issue-term="pathname"
        theme="github-light"
        crossorigin="anonymous"
        async>
</script>

You can see above code would be copied