👷 chore: add commitlint to CI

Author: svenvandescheur

.github/workflows/ci.yml

@@ -17,6 +17,34 @@ env:
   DOCKER_BUILDKIT: '1'
 
 jobs:
+  commitlint:
+    name: Lint commit messages
+    runs-on: ubuntu-latest
+
+    defaults:
+      run:
+        working-directory: frontend
+
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: 'frontend/.nvmrc'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Validate current commit (last commit) with commitlint
+        if: github.event_name == 'push'
+        run: npx commitlint --last --verbose
+
+      - name: Validate PR commits with commitlint
+        if: github.event_name == 'pull_request'
+        run: npx commitlint --from ${{ github.event.pull_request.base.sha }} --to ${{ github.event.pull_request.head.sha }} --verbose
+
   frontend-build:
     name: Build frontend
     runs-on: ubuntu-latest