Create go.yml

.github/workflows/go.yml

@@ -0,0 +1,24 @@
+name: CI
+
+on:
+  push:
+    branches: [ master ]
+  pull_request:
+    branches: [ master ]
+
+jobs:
+  diskimage:
+    runs-on: ubuntu-latest
+
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Ensure all files were formatted as per gofmt
+      run: |
+        gofmt -l $(find . -name '*.go') >/dev/null
+
+    - name: run build
+      run: go build .
+
+    - name: run tests
+      run: go test ./...