add filtering of posts

[gillins]

This is just a test - not for merging

[gillins]

@neilflood I think this is ready, but would be really good if you could build locally and confirm before we go 'live'....

[neilflood]

@gillins
I had a go at installing that set of stuff you gave me, but got some sort of conflict error at the sudo bundle install step

<long traceback of stuff>
.....
/var/lib/gems/3.2.0/gems/bundler-2.5.6/lib/bundler/worker.rb:90:in `block (2
levels) in create_threads'

An error occurred while installing bigdecimal (4.1.1), and Bundler
cannot continue.

In Gemfile:
  minima was resolved to 2.5.2, which depends on
    jekyll-feed was resolved to 0.17.0, which depends on
      jekyll was resolved to 4.3.4, which depends on
        jekyll-sass-converter was resolved to 3.1.0, which depends on
          sass-embedded was resolved to 1.99.0, which depends on
            google-protobuf was resolved to 4.34.1, which depends on
              bigdecimal

Unless you have a simple fix, I think I will leave this, and let's see if it just works anyway. A bit too much stuff I don't know anything about for me to feel comfortable messing with it.

[gillins]

OK that is weird. The check in this PR passed which is doing the same thing... At some stage we'll have to get this running so you can check a post before it goes live - misspelling a category could end up with an extra confusing category.

[gillins]

OK seemed to build ok on the site. I wonder if you have a different version of Ruby? I'm using 3.2.3, the github check was using 3.3.

[neilflood]

I just had a guess that ruby --version would tell me, and it turns out I am using 3.2.3.

I did also check the site, though, and I see what you ave done, and it all seems to have worked OK. Well done.

I am not too worried. I usually check the markdown part using retext, and am careful about the header info (which is obviously not markdown).