[Chore] Switch to GitHub Actions

Author: rvem

.buildkite/pipeline.yml

@@ -0,0 +1,24 @@
+name: CI
+on:
+  pull_request:
+  push:
+      branches: ["release"]
+
+jobs:
+  check:
+    runs-on: [self-hosted, nix]
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Check Nix flake
+        run: nix flake check -L
+
+  deploy:
+    runs-on: [self-hosted, nix]
+    if: github.ref == 'refs/heads/release'
+    needs: [check]
+    steps:
+      - uses: actions/checkout@v2
+
+      - name: Deploy
+        run: nix shell -f. inputs.deploy-rs.defaultPackage.x86_64-linux -c deploy -s