feat: add workflow

.github/workflows/go.yml

@@ -0,0 +1,21 @@
+name: build
+
+on: [push]
+
+jobs:
+  test-build:
+    name: Test & Build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Set up Go 
+        uses: actions/setup-go@v2
+        with:
+          go-version: ^1.16.1
+      - name: Check out code into the Go module directory
+        uses: actions/checkout@v2
+      - name: Test
+        run: make test
+      - name: Build
+        run: |
+          GOOS=linux go build -o ./bin/myhttp myhttp.go
+          ./bin/myhttp -h