Create build.yml

.github/workflows/build.yml

@@ -0,0 +1,29 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - 'main'
+      - 'v*'
+    tags:
+      - 'v*'
+  pull_request:
+    branches:
+      - 'main'
+      - 'v*'
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+    - run: mkdir build && cp lthn.json build/lthn.json
+    - uses: actions/upload-artifact@v2
+      with:
+        name: dist
+        path: build
+    - name: Release
+      uses: softprops/action-gh-release@v1
+      if: startsWith(github.ref, 'refs/tags/')
+      with:
+        files: build
+