Run checks in github actions

Author: jhh

.github/workflows/build.yml

@@ -6,12 +6,13 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
-    - uses: cachix/install-nix-action@v25
-      with:
-        nix_path: nixpkgs=channel:nixos-23.11
-    - uses: cachix/cachix-action@v14
-      with:
-        name: strykeforce
-        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
-    - run: nix build .#static
+      - uses: actions/checkout@v4
+      - uses: cachix/install-nix-action@v25
+        with:
+          nix_path: nixpkgs=channel:nixos-23.11
+      - uses: cachix/cachix-action@v14
+        with:
+          name: strykeforce
+          authToken: "${{ secrets.CACHIX_AUTH_TOKEN }}"
+      - run: nix flake check
+      - run: nix build .#static