New: Add unit tests using Node.js built-in test runner

.github/workflows/tests.yml

@@ -0,0 +1,15 @@
+name: Tests
+on: push
+jobs:
+  default:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+    steps:
+      - uses: actions/checkout@master
+      - uses: actions/setup-node@master
+        with:
+          node-version: 'lts/*'
+          cache: 'npm'
+      - run: npm ci
+      - run: npm test

.gitignore

@@ -0,0 +1,3 @@
+node_modules/
+.DS_Store
+Thumbs.db

lib/ServerUtils.js

@@ -142,7 +142,7 @@ class ServerUtils {
       }
       res
         .status(error.statusCode)
-        .json({ code: error.code, message: req.translate?.(error) ?? error.message })
+        .json({ code: error.code, message: req.translate?.(error) ?? error.message, data: error.data })
     }
     next()
   }