Add GitHub actions

.github/workflows/go.yaml

@@ -0,0 +1,22 @@
+---
+name: Build and test
+on:
+  push:
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: "1.21"
+
+      - name: Build
+        run: go build -v ./
+
+      - name: Test
+        run: go test -v ./ -race