add iso

.github/workflows/nixos.yml

@@ -5,6 +5,28 @@ on:
     branches: [main]
 
 jobs:
+  build-iso:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2.3.2
+
+      - name: "Install Nix ❄️"
+        uses: cachix/install-nix-action@v15
+
+      - name: "Install Cachix ❄️"
+        uses: cachix/cachix-action@v10
+        with:
+          name: 0x76-infra
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+
+      - name: "Check NixOS Flake ❄️"
+        run: |
+          nix build '.#iso'
+      - uses: actions/upload-artifact@v3
+        with:
+          name: nixos-iso
+          retention-days: 3
+          path: result/iso/*.iso
   build-null:
     runs-on: ubuntu-latest
     steps: