CI: [GitHub Actions] Build

.github/workflows/build.yml

@@ -0,0 +1,52 @@
+name: Build
+on:
+  push:
+    branches: [ master ]
+    paths:
+      - "**/*.go"
+      - "go.mod"
+      - "go.sum"
+  pull_request:
+    branches: [ master ]
+    types: [ opened, synchronize, reopened ]
+    paths:
+      - "**/*.go"
+      - "go.mod"
+      - "go.sum"
+
+jobs:
+  test:
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        os: [ windows-latest, ubuntu-latest, macos-latest ]
+        include:
+          - os: ubuntu-latest
+            BIN_SUFFIX:
+          - os: macos-latest
+            BIN_SUFFIX:
+          - os: windows-latest
+            BIN_SUFFIX: .exe
+    steps:
+      - name: Checkout codebase
+        uses: actions/checkout@v2
+
+      - name: Set up Go 1.x
+        uses: actions/setup-go@v2
+        with:
+          go-version: ^1.16
+
+      - name: Setup vars
+        id: vars
+        run: echo "::set-output name=short_sha::$(git rev-parse --short HEAD)"
+
+      - name: Build
+        env:
+          CGO_ENABLED: 0
+        run: go build -trimpath -ldflags="-w -s" -v -o um-${{ runner.os }}${{ matrix.BIN_SUFFIX }} ./cmd/um
+
+      - name: Publish artifact
+        uses: actions/upload-artifact@v2
+        with:
+          name: um-${{ runner.os }}${{ matrix.BIN_SUFFIX }}
+          path: ./um-${{ runner.os }}${{ matrix.BIN_SUFFIX }}