Move Lychee configuration to configuration file, replace lyheeignore and fix remaining false errors. (#95)

Author: samcunliffe

.github/workflows/build.yml

@@ -63,6 +63,6 @@ jobs:
         with:
           # nice to check a few specific root-level markdown files (README.md etc) for valid links,
           # but the main thing to check is the rendered website (in the `open-source` directory)
-          args: "--accept 200,429 --no-progress --verbose --github-token ${{ secrets.GITHUB_TOKEN }} -- README.md CONTRIBUTING.md open-source/"
+          args: "--github-token ${{ secrets.GITHUB_TOKEN }} -- README.md CONTRIBUTING.md open-source/"
           fail: true
           jobSummary: true

.lycheeignore

@@ -0,0 +1,10 @@
+accept = [200, 403, 415, 429]
+verbose = "info"
+no_progress = true
+exclude = [
+    '(?x).*profiles.ucl.ac.uk.*/thumbnail',   # People may not have a profile image.
+    '(?x).*github-readme-stats.vercel.app.*', # Returns 503 for some reason
+    '(?x).rdr.ucl.ac.uk/articles/*',          # Article does exist but sometimes returns strange codes: 202, 403...
+    '(?x).*127.0.0.1.*',                      # This is a local address
+    '(?x).*liveuclac.sharepoint.com/sites/*', # SharePoint pages will need UCL credentials.
+]