You can add a button to your pages that allows people to add comments. Prose.io is an overlay on Github that would allow people to make comments in an easier interface.
Edit me
About the review process
If you’re using the doc as code approach, you might also consider using the same techniques for reviewing the doc as people use in reviewing code. This approach will involve using Github to edit the files.
There’s an Edit me button on each page on this theme. This button allows collaborators to edit the content on Github.
Here’s the code for that button on the page.html layout:
{% if site.github_editme_path %}
<a href="https://github.com/{{site.github_editme_path}}{{page.url | replace: '.html', '.md'}}" class="btn btn-default " role="button"><i class="fa fa-github fa-lg"></i> Edit me</a>
{% endif %}
You could also make it so the Github button appears only when you’re working in a development environment.
{% if jekyll.environment == "development" %}
{% if site.github_editme_path %}
<a target="_blank" href="https://github.com/{{site.github_editme_path}}{{page.url | replace: '.html', '.md'}}" class="btn btn-default githubEditButton" role="button"><i class="fa fa-github fa-lg"></i> Edit me</a>
{% endif %}
To activate the development environment, add the environment flag in your build command:
JEKYLL_ENV=development jekyll serve
The default environment is production.
Add reviewers as collaborators
If you want people to collaborate on your project so that their edits get committed to a branch on your project, you need to add them as collaborators. For your Github repo, click Settings and add the collaborators on the Collaborators tab using their Github usernames.
If you don’t want to allow anyone to commit to your Github branch, don’t add the reviewers as collaborators. When someone makes an edit, Github will fork the theme. The person’s edit then will appear as a pull request to your repo. You can then choose to merge the change indicated in the pull or not.
Note: When you process pull requests, you have to accept everything or nothing. You can't pick and choose which changes you'll merge. Therefore you'll probably want to edit the branch you're planning to merge or ask the contributor to make some changes to the fork before processing the pull request.