I am new to Docker with multiple containers running. I have 2 services that I need to spin up namely lambda and my api-test app to run test cases in the container.

This is my docker-compose.yml

version: '3.8'

services:
  lambda:
    build:
      context: ../
      dockerfile: Dockerfile
    ports:
      - "9000:8080"
  api-test:
    build:
      context: ./api-test
      dockerfile: Dockerfile
    ports:
      - "8080:8080"
    depends_on:
      - lambda

My api-test app is not able to connect to lambda (localhost:9000 ) when i try to initiate http request. I’ve confirmed my lambda is up, only the api-test app not able to start successfully.

Getting error:

[RequestError: connect ECONNREFUSED 127.0.0.1:9000]

My Dockerfile:

FROM node:20-alpine

WORKDIR /app

COPY . .
RUN npm install
RUN npm run build

CMD ["npm", "test"]

In my index.test.ts, I have this code that generates the error

const sendEventToLambda = async (event: LambdaEvent) => {
  try {
    return await got
      .post(lambdaUrl, {
        body: JSON.stringify(event),
        timeout: {
          request: 50000,
        },
      })
      .json();
  } catch (e) {
    return e;
  }
};

Is there anything that I missed? Any help is much appreciated, thank you so much!