New workflow: PR auto labeller (#99)

* Adding Label PR workflow
* Adding config file for Label PR action
* added test and docs to config
* Added Labeller to action list in contributing guide

Author: Gordon Byers

.github/labeler.yml

@@ -0,0 +1,11 @@
+# Add 'helper-ui' to any changes within 'helper' folder or any subfolders
+helper-ui:
+- helper/**/*
+
+# Add 'test' label to any change to *.spec.js files
+test:
+- '*.spec.js'
+
+# Add 'documentation' label to any change to *.md files
+documentation:
+- '*.md'

.github/workflows/label.yml

@@ -0,0 +1,22 @@
+# This workflow will triage pull requests and apply a label based on the
+# paths that are modified in the pull request.
+#
+# To use this workflow, you will need to set up a .github/labeler.yml
+# file with configuration.  For more information, see:
+# https://github.com/actions/labeler
+
+name: Labeler
+on: [pull_request]
+
+jobs:
+  label:
+
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      pull-requests: write
+
+    steps:
+    - uses: actions/labeler@v2
+      with:
+        repo-token: "${{ secrets.GITHUB_TOKEN }}"

CONTRIBUTING.md

@@ -15,6 +15,7 @@ Various workflows run on Push / PR / Schedule.
 | Bicep Build | Every Push | `Quality` To run the bicep linter upon changes to the bicep files  |
 | Greetings   | Issue / PR | `Community` Greeting new contributors to the repo |
 | Stale bot   | Issue / PR | `Tidy` Marks old issues as stale |
+| Labeler   | PR | `Tidy` Adds relevant labels to PR's based on files changed |
 | Publish Helper | PR | `Quality` Tests changes to the UI work |
 | Publish Helper | Push `main` | Publishes the UI to GitHub Pages |
 | Check Markdown | PR | `Quality` Checks markdown files for spelling mistakes |