Add Biome CI GH workflow (#30)

.github/workflows/nextjs.yml

@@ -0,0 +1,31 @@
+# This workflow runs whenever a PR is opened or updated, or a commit is pushed to main. It runs
+# several checks:
+# - check: checks that the code does not contain any biome warnings
+
+# This configuration allows maintainers of this repo to create a branch and pull request based on
+# the new branch. Restricting the push trigger to the main branch ensures that the PR only gets
+# built once.
+on:
+  push:
+    branches: [main]
+  pull_request:
+    paths:
+      - 'crates/web/frontend/**'
+# If new code is pushed to a PR branch, then cancel in progress workflows for that PR. Ensures that
+# we don't waste CI time, and returns results quicker https://github.com/jonhoo/rust-ci-conf/pull/5
+concurrency:
+  group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
+  cancel-in-progress: true
+name: nextjs
+jobs:
+  ci:
+    runs-on: ubuntu-latest
+    name: biome ci
+    steps:
+      - uses: actions/checkout@v4
+      - uses: biomejs/setup-biome@v2 # Biome automatically detects the version based on the lockfile
+        with:
+          working-dir: crates/web/frontend
+      - name: Run biome check
+        working-directory: crates/web/frontend
+        run: biome ci ./src