NodeJS GAE Issue Reproduction

package.json

{
  "name": "node-gae-issue",
  "version": "0.0.1",
  "author": "Soravis Prakkamakul",
  "private": true,
  "main": "./build/bin/server",
  "scripts": {
    "eslint": "./node_modules/.bin/eslint --quiet **/**/*.js **/*.js **.js",
    "test": "mocha ./tests/**/*.spec.js --compilers js:babel-register",
    "test-cov": "nyc -r lcovonly mocha ./tests/**/*.spec.js --compilers js:babel-register",
    "lcov": "onchange 'src/**/*.js' 'tests/**/*.js' -- npm run test-cov",
    "pre-push": "npm run eslint && npm run lcov",
    "test-watch": "mocha -R dot --watch ./tests/**/*.spec.js --compilers js:babel-register",
    "start": "node app.js",
    "start-gateway": "SERVICE_NAME=gateway node ./build/bin/server",
    "start-user": "SERVICE_NAME=user-service node ./build/bin/server",
    "start-add-message": "SERVICE_NAME=add-message-service PORT=9091 node ./build/bin/server",
    "pm2": "pm2 delete all; pm2 start pm2.json",
    "pm2-dev": "pm2 delete all; pm2-dev start pm2.json",
    "pm2-dev-add-message": "pm2 delete add-message-service; pm2-dev start pm2-add-message.json",
    "pm2-dev-new-project": "pm2 delete add-message-new-project-service; pm2-dev start pm2-add-message-new-project.json",
    "dev": "DEBUG=dev NODE_ENV=dev ./node_modules/.bin/babel-node ./src/bin/server",
    "dev-gateway": "DEBUG=dev NODE_ENV=dev SERVICE_NAME=gateway ./node_modules/.bin/babel-node ./src/bin/server",
    "dev-user": "DEBUG=dev NODE_ENV=dev SERVICE_NAME=user-service PORT=9092 ./node_modules/.bin/babel-node ./src/bin/server",
    "dev-add-message": "DEBUG=dev NODE_ENV=dev SERVICE_NAME=add-message-service PORT=9091 ./node_modules/.bin/babel-node ./src/bin/server",
    "build": "./node_modules/.bin/babel src -d build --copy-files",
    "deploy-all": "npm run build; cp ./deploy/* ./; gcloud -q app deploy service.yaml --promote --version=1; gcloud -q app deploy message-service.yaml --promote --version=1; gcloud -q app deploy management-service.yaml --promote --version=1; gcloud -q app deploy add-message-service.yaml --promote --version=1"
  },
  "dependencies": {
    "babel-cli": "^6.10.1",
    "babel-core": "^6.10.4",
    "babel-eslint": "^6.1.0",
    "babel-loader": "^6.2.4",
    "babel-plugin-transform-runtime": "^6.9.0",
    "babel-polyfill": "^6.9.1",
    "babel-preset-es2015": "^6.9.0",
    "babel-preset-stage-0": "^6.5.0",
    "babel-register": "^6.9.0",
    "babel-runtime": "^6.9.2",
    "bcrypt": "^0.8.7",
    "bluebird": "^3.4.1",
    "body-parser": "^1.15.1",
    "chai": "^3.5.0",
    "chai-as-promised": "^5.3.0",
    "config": "^1.21.0",
    "cors": "^2.7.1",
    "debug": "^2.2.0",
    "express": "^4.13.4",
    "express-validator": "^2.20.9",
    "express-winston": "^2.0.0",
    "google-cloud": "^0.38.3",
    "gstore-node": "^0.6.2",
    "helmet": "^2.1.1",
    "joi": "^9.0.4",
    "knex": "^0.11.10",
    "lodash": "^4.13.1",
    "lodash-deep": "^2.0.0",
    "mocha": "^2.5.3",
    "moment": "^2.14.1",
    "morgan": "^1.7.0",
    "randomstring": "^1.1.5",
    "sinon": "^1.17.4",
    "superagent": "^2.0.0",
    "winston": "^2.2.0"
  },
  "devDependencies": {
    "debug": "^2.2.0",
    "eslint": "^2.13.1",
    "eslint-config-airbnb": "^9.0.1",
    "eslint-plugin-babel": "^3.3.0",
    "eslint-plugin-import": "^1.9.2",
    "eslint-plugin-jsx-a11y": "^1.5.3",
    "eslint-plugin-react": "^5.2.2",
    "jshint": "^2.9.2",
    "nyc": "^8.1.0",
    "onchange": "^2.5.0",
    "supertest": "^1.2.0",
    "webpack": "^1.13.1"
  }
}