perf: Add dns-prefetch for static resources

[denisx]

Prerequisites checklist

• I have read the contributing guidelines.

What is the purpose of this pull request?

To remove the delay on dns connection of static files from external resources

What changes did you make? (Give an overview)

Add dns-prefetch of popular static files to speed up site performance

[eslint-github-bot]

Hi @denisx!, thanks for the Pull Request

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[eslint-github-bot]

Hi @denisx!, thanks for the Pull Request

The pull request title isn't properly formatted. We ask that you update the pull request title to match this format, as we use it to generate changelogs and automate releases.

• The commit message tag wasn't recognized. Did you mean "docs", "fix", or "feat"?
• There should be a space following the initial tag and colon, for example 'feat: Message'.
• The first letter of the tag should be in lowercase

To Fix: You can fix this problem by clicking 'Edit' next to the pull request title at the top of this page.

Read more about contributing to ESLint here

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[kecrily]

LGTM

[aladdin-add]

I'm changing the tag to perf, otherwise LGTM, thanks!