Set up nix flakes

.forgejo/workflows/test.yaml

@@ -2,30 +2,24 @@ name: Test
 
 on:
   push:
-    branches:
-      - main
   pull_request:
-    branches:
-      - main
   schedule:
     - cron: '0 0 1 * *' # Monthly
 
-
 env:
   SLIGRO_USERNAME: ${{ secrets.SLIGRO_USERNAME }}
   SLIGRO_PASSWORD: ${{ secrets.SLIGRO_PASSWORD }}
 
+defaults:
+  run:
+    shell: nix develop --command {0}
+
 jobs:
 
-  pytest:
-    runs-on: docker
-    container:
-      image: alpine:latest
+  test:
+    runs-on: nix
     steps:
-    - run: apk add nodejs py3-pip ruff
     - uses: actions/checkout@v4
-    - run: pip install -r requirements.txt --break-system-packages
 
     - run: pytest
-
     - run: ruff check