Feature/docker kuntoon (#11)

Co-authored-by: moilanik <niko.moilanen@tietoevry.com>
Reviewed-on: #11

tests/features/step_definitions/common.steps.js

@@ -6,10 +6,15 @@ const PROJECT_ROOT = path.resolve(__dirname, '..', '..', '..');
 const MOCK_SCRIPT = path.join(PROJECT_ROOT, 'tests', 'helpers', 'mock-api.sh');
 
 Before({ tags: '@mock' }, function () {
-  execSync(`bash -c 'source "${MOCK_SCRIPT}" && mock_start'`, {
+  const out = execSync(`bash -c 'source "${MOCK_SCRIPT}" && mock_start && sleep 0.3 && curl -s -o /dev/null -w "%{http_code}" --max-time 3 http://localhost:18080/api/v1/repos/health/check'`, {
     cwd: PROJECT_ROOT,
-    stdio: 'ignore',
+    encoding: 'utf-8',
+    stdio: ['pipe', 'pipe', 'pipe'],
   });
+  const trimmed = out.trim();
+  if (!trimmed.startsWith('2') && !trimmed.startsWith('4')) {
+    throw new Error(`Mock server failed to start (HTTP ${trimmed})`);
+  }
 });
 
 After({ tags: '@mock' }, function () {