Add minimal CI config and docs

.github/workflows/update-flakes.yml

@@ -0,0 +1,26 @@
+name: nix flake update
+on:
+  schedule:
+    - cron: "30 0 * * *"
+  push:
+    branches: [main]
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Set up Nix
+        uses: cachix/install-nix-action@v14
+        with:
+          nix_path: nixpkgs=channel:nixos-unstable
+
+      - name: Update flake
+        run: nix flake update
+
+      - name: Commit and push changes
+        run: |
+          git config --global user.name "github-actions[bot]"
+          git config --global user.email "github-actions[bot]@users.noreply.github.com"
+          git add flake.lock
+          git commit -m "Update flake.lock" || echo "No changes to commit"
+          git push

.wakatime-project

@@ -0,0 +1 @@
+@andreijiroh-dev/nixops-config