add nix build (fully commented)

.github/workflows/xperimental-nix.yml

@@ -0,0 +1,57 @@
+#### NOTE: This job is disabled until nix supports the latest cargo workspace features.
+#### See: https://github.com/NixOS/nixpkgs/pull/217232
+#
+#name: nix-build
+#on:
+#  pull_request:
+#  push:
+#    branches: [main, 'release-v**']
+#jobs:
+#  build:
+#    runs-on: ubuntu-latest
+#    steps:
+#      - uses: actions/checkout@v3
+#        with:
+#          # Nix Flakes doesn't work on shallow clones
+#          fetch-depth: 0
+#      - uses: cachix/install-nix-action@v17
+#        with:
+#          install_url: https://releases.nixos.org/nix/nix-2.10.3/install
+#      - uses: cachix/cachix-action@v10
+#        with:
+#          name: centrifuge-chain
+#          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+#      - name: Build centrifuge-chain
+#        run: nix build --no-allow-dirty -L
+
+# name: docker
+# on:
+#   push:
+#     branches: [main, 'release-v**']
+# jobs:
+#   docker:
+#     strategy:
+#       matrix:
+#         os: [ ubuntu-latest ]
+#         target: [".#dockerImage", ".#dockerImageFastRuntime"]
+#     runs-on: ${{ matrix.os }}
+#     steps:
+#       - uses: actions/checkout@v3
+#         with:
+#           fetch-depth: 0
+#       - uses: cachix/install-nix-action@v17
+#         with:
+#           install_url: https://releases.nixos.org/nix/nix-2.10.3/install
+#       - name: Build Docker image
+#         run: |
+#           nix build --no-allow-dirty -L ${{ matrix.target }}
+#           docker load < result
+#       - name: Login to Docker Hub
+#         uses: docker/login-action@dd4fa0671be5250ee6f50aedf4cb05514abda2c7
+#         with:
+#           username: ${{ secrets.DOCKER_HUB_USERNAME }}
+#           password: ${{ secrets.DOCKER_HUB_TOKEN }}
+#       - name: List images
+#         run: docker images
+#       - name: Push image to Docker Hub
+#         run: docker push --all-tags --quiet centrifugeio/centrifuge-chain