I've been testing out the Cloudron github pages app, using approximately the test case outlined in the earlier post here:

https://forum.cloudron.io/post/1889

Although correctly pushing the repository inside the site, so

gem install bundler jekyll
jekyll new my-awesome-site
cd my-awesome-site
git init
git add .
git commit -m 'initial commit'
git remote add page https://my.domain/_git/page
git push page master

After the push succeeds, I visit the app's URL, and I see an error:

Error: ENOENT: no such file or directory, stat '/app/data/website/404.html'

Inspecting the contents of /app/data/website/, it's not the built version of the site. It looks like a copy of the latest master branch commit, which intentionally has no 404.html, nor an index.html file.

Shouldn't the app have built the site, and published the result in /app/data/website/?

At the very least I'd have expected some evidence of a _site folder or log entries showing that Jekyll has been run. The logs simply show:

Jun 27 12:01:17 => First run, create bare repo
Jun 27 12:01:17 Initialized empty Git repository in /app/data/repo.git/
Jun 27 12:01:17 => Install welcome page
Jun 27 12:01:17 => Update welcome page
Jun 27 12:01:17 => Ensure git hook
Jun 27 12:01:17 => Ensure permissions
Jun 27 12:01:17 => Run server
Jun 27 12:01:17 Listening on port 3000
Jun 27 12:01:17 Using git repo at /app/data/repo.git
Jun 27 12:01:17 Serving up directory /app/data/website
Jul 05 11:25:59 git: info {}
Jul 05 11:26:11 git: info {}
Jul 05 12:01:34 git: info {}
Jul 05 12:01:40 git: info {}
Jul 05 12:01:40 git: push {
Jul 05 12:01:40 head: '5c044c8e60311e7bb76c61817d3c3b65eededd46',
Jul 05 12:01:40 last: '0095e37ae41807050bb92ead9279c38dfc84151bb247',
Jul 05 12:01:40 refname: 'refs/heads/master',
Jul 05 12:01:40 ref: 'heads',
Jul 05 12:01:40 name: 'master',
Jul 05 12:01:40 branch: 'master'
Jul 05 12:01:40 }
Jul 05 12:01:52 Error: ENOENT: no such file or directory, stat '/app/data/website/404.html'

I was wondering if the build is failing because of Jekyll version differences.

I attempted to match the version exactly. Unfortunately the latest version of Jekyll mentioned in the updates thread (3.8.7) won't install due to errors (Bundler could not find compatible versions for gem "kramdown"), so I used the next version up which will install, 3.9.2. (I note Jekyll has a 4.0 series now).

I'm not sure how crucial that version for the app to work correctly - but I don't see any errors in the logs, so I can only assume it's okay to have a slight difference? If the Github Pages app is very sensitive to version differences in Jekyll, how would I deal with errors such as the one above, due to changes in compatible versions of other gems?

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