Add healthcheck to json_server and wait for it in test-rest

- Added Node.js-based healthcheck to json_server to verify it's ready
- Updated test-rest depends_on to wait for json_server health
- This ensures tests don't start before json_server is ready to respond
- Should fix race condition causing 'Cannot read properties of undefined' errors in CI

Author: kobenguyent

test/docker-compose.yml

@@ -11,8 +11,10 @@ services:
         - MOCK_SERVER_HOST=mock_server
     command: ['/codecept/node_modules/.bin/mocha', 'test/rest']
     depends_on:
-      - json_server
-      - mock_server
+      json_server:
+        condition: service_healthy
+      mock_server:
+        condition: service_started
 
   test-acceptance.webdriverio:
     build: ..
@@ -72,6 +74,12 @@ services:
     ports:
       - '8010:8010' # Expose to host
     restart: always # Automatically restart the container if it fails or becomes unhealthy
+    healthcheck:
+      test: ["CMD", "node", "-e", "require('http').get('http://localhost:8010/posts', (res) => process.exit(res.statusCode === 200 ? 0 : 1)).on('error', () => process.exit(1))"]
+      interval: 2s
+      timeout: 3s
+      retries: 10
+      start_period: 5s
 
   mock_server:
     <<: *test-service