Separate out GitHub Actions

.github/workflows/build_and_test.yml

@@ -0,0 +1,25 @@
+name: "Build and Unit Test"
+on: pull_request
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+
+      - uses: actions/setup-go@v2
+        with:
+          go-version: '1.17'
+
+      - uses: actions/cache@v2
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ inputs.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: ${{ inputs.os }}-go-
+
+      - name: Build binary
+        run: go install ./cmd/litestream
+
+      - name: Run unit tests
+        run: make testdata && go test -v ./...