add actions

.github/workflows/check.yaml

@@ -0,0 +1,14 @@
+---
+name: "Tests and checks"
+on:
+  pull_request:
+  push:
+jobs:
+  checks:
+    runs-on: ubuntu-latest
+    name: Checks
+    steps:
+      - uses: actions/checkout@v3
+      - uses: cachix/install-nix-action@v22
+      - name: Nix checks
+        run: nix flake check -L

.github/workflows/release.yaml

@@ -0,0 +1,18 @@
+name: LuaRocks release
+on:
+  push:
+    tags: # Will upload to luarocks.org when a tag is pushed
+      - "*"
+  pull_request: # Will test a local install without uploading to luarocks.org
+
+jobs:
+  luarocks-release:
+    runs-on: ubuntu-latest
+    name: LuaRocks upload
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: LuaRocks Upload
+        uses: nvim-neorocks/luarocks-tag-release@v5
+        env:
+          LUAROCKS_API_KEY: ${{ secrets.LUAROCKS_API_KEY }}