Cloud Run 错误：容器无法启动。无法启动并监听 PORT 定义的端口

Question

运行这段代码一切正常。

require('dotenv').config();
const express = require('express');
const Firestore = require('@google-cloud/firestore');
const path = require('path');


const app = express();

app.get('/', function (req, res) {
    console.log('hello-cloud-run', 'request received');

    const target = process.env.TARGET || 'Juan';
    res.send(`Hello ${target} from Notch - Shopify Webhooks!`);
 });

 const port = process.env.PORT || 8080;

 app.listen(port,  () => {
    console.log('Webhook app listening on port ', port);
 });

但是，如果我添加 Firestore 行（以 const db = 开头的行），我会收到 Cloud Run 错误：容器无法启动。无法启动并侦听 PORT 环境变量定义的端口。此修订的日志可能包含更多信息。

require('dotenv').config();
const express = require('express');
const Firestore = require('@google-cloud/firestore');
const path = require('path');


const app = express();

const db = new Firestore({
    projectId: 'kuracao-db',
    keyFilename: path.join(__dirname, process.env.GOOGLE_APPLICATION_CREDENTIALS)
});


app.get('/', function (req, res) {
    console.log('hello-cloud-run', 'request received');

    const target = process.env.TARGET || 'Juan';
    res.send(`Hello ${target} from Notch - Shopify Webhooks!`);
});

const port = process.env.PORT || 8080;

app.listen(port,  () => {
    console.log('Webhook app listening on port ', port);
 });

为什么添加 Firestore 数据库会导致 Cloud Run 错误？

错误：(gcloud.run.deploy) Cloud Run 错误：容器无法启动。无法启动并侦听 PORT 环境变量定义的端口。此修订的日志可能包含更多信息。

FROM node:14

WORKDIR /app

COPY package*.json ./

RUN npm install

COPY . . 

CMD ["npm", "start"]

Answer 1

我变了

const db = new Firestore({
  projectId: 'kuracao-db',
  keyFilename: path.join(__dirname, process.env.GOOGLE_APPLICATION_CREDENTIALS)
});

到

const db = new Firestore();

它有效，现在我想知道为什么。从 Cloud Run 运行时不需要凭据？有道理，但这与端口错误有什么关系？