Add Github Actions CI (#27)

.github/workflows/test.yaml

@@ -0,0 +1,40 @@
+name: test
+
+on:
+  push:
+    branches:
+      - main
+      - master
+  pull_request:
+  workflow_dispatch:
+
+env:
+  GO111MODULE: "auto"
+
+jobs:
+  test:
+    strategy:
+      matrix:
+        go-version: [1.16.x, 1.17.x]
+        os: [ubuntu-latest]
+    runs-on: ${{ matrix.os }}
+    steps:
+      - name: Install Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ matrix.go-version }}
+      - name: Checkout code
+        uses: actions/checkout@v2
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v2
+        with:
+          version: latest
+      - name: go coverage
+        run: |
+          go test -mod=readonly -v -race -covermode=atomic -coverprofile=coverage.out ./...
+      - uses: codecov/codecov-action@v2
+        if: success()
+        with:
+          file: ./coverage.out
+          flags: unbound_exporter_tests
+          name: unbound_exporter tests