feat: add workflow to check configuration

.github/workflows/nixos.yml

@@ -0,0 +1,66 @@
+name: NixOS
+concurrency: nixos
+
+on:
+  pull_request:
+  push:
+    branches:
+      - experimental
+    paths-ignore:
+      - "README.md"
+      - "NOTES.md"
+      - ".gitignore"
+
+jobs:
+  build-dekomori:
+    runs-on: ubuntu-latest
+    steps:
+      - name: "Create Dir for Mounting moar Disk Space"
+        run: |
+          sudo mkdir /nix
+
+      - name: "Maximize Disk Space 1"
+        run: |
+          sudo rm -rf $AGENT_TOOLSDIRECTORY
+          sudo rm -rf /usr/local/.ghcup
+          sudo rm -rf /usr/local/share/powershell
+          sudo rm -rf /usr/local/share/chromium
+          sudo rm -rf /usr/local/lib/node_modules
+          sudo rm -rf /usr/local/lib/heroku
+          sudo rm -rf /var/lib/docker/overlay2
+          sudo rm -rf /home/linuxbrew
+          sudo rm -rf /home/runner/.rustup
+
+      - name: "Maximize Disk Space 2"
+        uses: easimon/maximize-build-space@v8
+        with:
+          root-reserve-mb: 8192
+          swap-size-mb: 1024
+          build-mount-path: /nix
+          remove-dotnet: "true"
+          remove-android: "true"
+          remove-haskell: "true"
+          remove-codeql: "true"
+          remove-docker-images: "true"
+
+      - uses: actions/checkout@v3
+
+      - name: "Install Nix"
+        uses: cachix/install-nix-action@v20
+        with:
+          extra_nix_config: |
+            access-tokens = github.com=${{ secrets.GITHUB_TOKEN }}
+
+      - name: "Install Cachix"
+        uses: cachix/cachix-action@v12
+        with:
+          name: workflow-nixos-config
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+
+      - name: "Build NixOS config ❄️"
+        run: |
+          nix build .#nixosConfigurations.dekomori.config.system.build.toplevel --accept-flake-config
+
+      - name: "Check NixOS flake ❄️"
+        run: |
+          nix flake check --accept-flake-config