Fixed link checker (#1574)

* Update container image for CI

* Re-enable for push (good to test)

* Restructure GH action

Instead of using a custom container, use the base Ubuntu
release and the GH actions needed to setup ruby, install Jekyll and
then run it.

* Exact ruby version

* Use ruby setup bundler install

Simplify Gemfile

* Update _config.yml

Change site.name to site.title and also update description

* Add an intentional bad link

* Further link tests

* Remove test links

.github/workflows/link_check.yaml

@@ -1,21 +1,23 @@
-name: link_checker
+name: Check Markdown links
 
 on: [push, pull_request]
 
 jobs:
-  check_new_links:
-    name: link_checker
+  markdown-link-check:
     runs-on: ubuntu-latest
-    container: hepsoftwarefoundation/hsf-jekyll
+    strategy:
+      fail-fast: false
     steps:
-      - name: checkout repository
+      - name: Checkout
         uses: actions/checkout@v4
-
-      - name: jekyll build
-        run: |
-          bundler exec jekyll build
-
-      - name: actions link checker
+      - name: Ruby Install
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: '3.2'
+          bundler-cache: true
+      - name: Jekyll Build
+        run: bundler exec jekyll build
+      - name: Check Links
         uses: gaurav-nelson/github-action-markdown-link-check@v1
         with:
           config-file: '.github/config/mdcheck.json'

Gemfile

@@ -1,14 +1,3 @@
 source "https://rubygems.org"
 
-gem 'jekyll-feed'
-gem "github-pages", ">= 150"
-gem "html-proofer"
-
-# Suggested by Jekyll
-gem 'wdm', '>= 0.1.0' if Gem.win_platform?
-
-# Required on Windows
-gem 'tzinfo-data'  if Gem.win_platform?
-
-# Needed for Ruby > 3.1? due to changed dependencies
-gem 'webrick'
+gem 'github-pages', group: :jekyll_plugins

_config.yml

@@ -1,5 +1,5 @@
-name: HEP Software Foundation Newsletter
-description: News from the HEP Software Foundation
+title: HEP Software Foundation
+description: HEP Software Foundation Website
 url: http://www.hepsoftwarefoundation.org
 excerpt_separator: <!--more-->
 timezone: Europe/Paris