Only build when pushed to master

.github/workflows/build.yml

@@ -1,5 +1,8 @@
 name: build
-on: [push, pull_request]
+on:
+  push:
+    branches:
+      - master
 permissions:
   contents: read
   pages: write
@@ -16,7 +19,7 @@ jobs:
     - name: Setup node
       uses: actions/setup-node@v3
       with:
-        node-version: 18.x
+        node-version: lts/*
         check-latest: true
     - name: Build and test
       run: |

.github/workflows/test.yml

@@ -0,0 +1,24 @@
+name: test
+on: [pull_request]
+concurrency:
+  group: "test"
+  cancel-in-progress: false
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+    - name: Setup node
+      uses: actions/setup-node@v3
+      with:
+        node-version: lts/*
+        check-latest: true
+    - name: Build and test
+      run: |
+        npm ci
+        npm run prepare
+    - name: Check coverage
+      uses: coverallsapp/github-action@master
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}