Add luarocks-tag-release workflow (#11)

.github/workflows/release.yml

@@ -0,0 +1,20 @@
+---
+name: "Release"
+on:
+  push:
+    tags:
+      - 'v*.*.*'
+
+jobs:
+  luarocks-release:
+    runs-on: ubuntu-latest
+    name: Luarocks Release
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+        if: env.LUAROCKS_API_KEY != null
+      - name: Luarocks Upload
+        uses: nvim-neorocks/luarocks-tag-release@v5
+        if: env.LUAROCKS_API_KEY != null
+        env:
+          LUAROCKS_API_KEY: ${{ secrets.LUAROCKS_API_KEY }}

README.md

@@ -6,6 +6,9 @@ The intention is that you use this template to create a new repository where you
 The template includes the following:
 
 - GitHub workflows to run linters and tests
+- Packaging of tagged releases and upload to [LuaRocks](https://luarocks.org/)
+  if a [`LUAROCKS_API_KEY`](https://luarocks.org/settings/api-keys) is added
+  to the [GitHub Actions secrets](https://docs.github.com/en/actions/security-guides/encrypted-secrets#creating-encrypted-secrets-for-a-repository)
 - Minimal test setup
 - EditorConfig
 - A .luacheckrc