Initial commit

Include Nix package, build pipeline

.gitea/workflows/build.yml

@@ -0,0 +1,16 @@
+name: "Build and test"
+on:
+  push:
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: https://gitea.com/actions/checkout@v3
+      - name: Install nix
+        uses: https://github.com/cachix/install-nix-action@v23
+        with:
+          github_access_token: ${{ secrets.INPUT_GITHUB_ACCESS_TOKEN }}
+      - name: Build package
+        run: nix build