[CI] Forgejo tests

.forgejo/workflows/build.yaml

@@ -0,0 +1,10 @@
+on: [push]
+jobs:
+  test:
+    runs-on: docker
+    container: ubuntu:rolling
+    steps:
+      - run: yes | apt update && apt install nodejs
+      - uses: actions/checkout@v4
+      - uses: https://github.com/cachix/install-nix-action@v22
+      - run: nix --version