.github: add job to build binaries on Windows

.github/workflows/run_tests.yml

@@ -129,8 +129,8 @@ jobs:
       - name: Run tests
         run: go test -v -race ./...
 
-  build_cli:
-    name: Build CLI
+  build_cli_ubuntu:
+    name: Build CLI (Ubuntu)
     runs-on: ubuntu-20.04
 
     steps:
@@ -155,8 +155,34 @@ jobs:
       - name: Build CLI
         run: make build
 
+  build_cli_win:
+    name: Build CLI (Windows)
+    runs-on: windows-2019
+
+    steps:
+      - uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.17
+
+      - name: Restore Go modules from cache
+        uses: actions/cache@v2
+        with:
+          path: /home/runner/go/pkg/mod
+          key: deps-${{ hashFiles('go.sum') }}
+
+      - name: Update Go modules
+        run: go mod download -json
+
+      - name: Build CLI
+        run: make build
+
   build_image:
-    needs: build_cli
+    needs: build_cli_ubuntu
     name: Build Docker image
     runs-on: ubuntu-20.04