initial ci

.github/workflows/ci.yaml

@@ -0,0 +1,24 @@
+---
+name: 'CI'
+
+"on": push
+
+permissions:
+  contents: write
+  id-token: write
+
+
+concurrency:
+  group: '${{ github.workflow }} @ ${{ github.event.pull_request.head.label || github.head_ref || github.ref }}'
+  cancel-in-progress: true
+
+jobs:
+  ci:
+    runs-on: ["ubuntu-latest"]
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - uses: DeterminateSystems/nix-installer-action@main
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - uses: HatsuneMiku3939/direnv-action@v1
+      - run: bazel test //...