fix: Simplify CI workflow

.gitea/workflows/ci.yml

@@ -1,25 +1,19 @@
+name: CI
+
 on:
   push:
-    branches: [main]
+    branches: [ main ]
   pull_request:
-    branches: [main]
+    branches: [ main ]
 
 jobs:
-  test:
+  build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+    - uses: actions/checkout@v4
-
+    - uses: actions/setup-node@v4
-      - uses: actions/setup-node@v4
+      with:
-        with:
+        node-version: '20'
-          node-version: '20'
+    - run: npm ci
-          cache: 'npm'
+    - run: npm run build --if-present
-
+    - run: npm test --if-present
-      - name: Install dependencies
-        run: npm ci
-
-      - name: Build
-        run: npm run build
-
-      - name: Run tests
-        run: npm test