feat: add nix flake support

* Add nix flake

* Fix readme syntax issue

* Format nix flake

* ci(build): add nix flake support

* ci(build): fix workflow_dispatch casing

* ci(build): fix nix flake lock update job

* ci: add nix flake lock update timer job

old method didn't work

* improve example and add cachix info

Co-authored-by: Jake Stanger <mail@jstanger.dev>

.github/workflows/build.yml

@@ -1,6 +1,7 @@
 name: Build
 
 on:
+  workflow_dispatch:
   push:
     branches: [ "master" ]
   pull_request:
@@ -35,3 +36,25 @@ jobs:
 
       - name: Check formatting
         run: cargo fmt --check
+
+
+
+  build-nix:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: cachix/install-nix-action@v17
+        with:
+          install_url: https://nixos.org/nix/install
+          extra_nix_config: |
+            auto-optimise-store = true
+            experimental-features = nix-command flakes
+
+      - uses: cachix/cachix-action@v11
+        with:
+          name: jakestanger
+          signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
+
+      - run: nix build --print-build-logs