CI: build package with Go & Nix

.github/workflows/go.yml

@@ -0,0 +1,32 @@
+name: Build
+
+on:
+  push:
+    branches: [ "main" ]
+  pull_request:
+    branches: [ "main" ]
+
+jobs:
+  build-go:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v3
+    - name: Set up Go
+      uses: actions/setup-go@v4
+      with:
+        go-version: '1.21'
+    - name: Build
+      run: go build -v ./.
+  
+  build-nix:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+    - name: Install Nix
+      uses: DeterminateSystems/nix-installer-action@main
+    - name: Nix Magic Cache
+      uses: DeterminateSystems/magic-nix-cache-action@main
+    - name: Build with Nix
+      run: nix build .# -Lv