Workflow: create seperate build workflow

.github/workflows/build.yml

@@ -0,0 +1,30 @@
+name: "artifact-build"
+on:
+  push:
+  pull_request:
+    branches: [ "main" ]
+
+env:
+  cloudflare_project: noogle
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v23
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - uses: cachix/cachix-action@v12
+      with:
+        name: nix-community
+        authToken: '${{ secrets.CACHIX_AUTH_TOKEN }}'
+    - run: nix build .#ui -L
+    - name: Save output
+      if: github.event_name != 'push'
+      uses: actions/upload-artifact@v4
+      with:
+        name: out
+        path: ./result