Add debug workflow

.github/workflows/debug.yml

@@ -0,0 +1,46 @@
+name: Debug build
+
+on:
+  push:
+    branches:
+      - main
+      - dev
+    paths-ignore:
+      - '**.md'
+      - '.github/**'
+      - '!.github/workflows/debug.yml'
+  pull_request:
+    branches:
+      - dev
+
+jobs:
+  build:
+    name: Debug build
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+      - name: Get latest go version
+        id: version
+        run: |
+          echo ::set-output name=go_version::$(curl -s https://raw.githubusercontent.com/actions/go-versions/main/versions-manifest.json | grep -oE '"version": "[0-9]{1}.[0-9]{1,}(.[0-9]{1,})?"' | head -1 | cut -d':' -f2 | sed 's/ //g; s/"//g')
+      - name: Setup Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: ${{ steps.version.outputs.go_version }}
+      - name: Build
+        run: |
+          version=`git rev-parse HEAD`
+          mkdir build
+          pushd build
+          go mod init build
+          go get -v github.com/sagernet/sing-box@$version
+          popd
+          go build -v ./...
+          go test -v ./...
+      - name: Run Test
+        run: |
+          cd test
+          go test -v ./...