port to 8081

Author: taylrzhang

examples/microservices/books/package-lock.json

@@ -11,11 +11,12 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "body-parser": "^1.19.0",
     "@chronosmicro/tracker": "file:../../../chronos_npm_package",
+    "body-parser": "^1.19.0",
     "cors": "^2.8.5",
     "dotenv": "^8.2.0",
     "express": "^4.17.1",
+    "hpropagate": "^1.0.1",
     "mongoose": "^5.8.1",
     "node-fetch": "^2.6.7",
     "nodemon": "^2.0.2",