Docker Connection Reset

[bstopp]

Hey team - hoping someone can help me out here. Trying to use this library to build some test cases, which rely on using S3 API. However, something odd is happening. If i don't use dockerode to start a container, the API calls via mocha tests work fine. But when running the container via dockerode, they fail with Error: read ECONNRESET

here's a mocha test file that shows the issue. Can anyone point out what i'm doing wrong? Maybe i've got the container definition misconfigured? (If so, i can't determine what may be wrong)

Test cases work when manually running: docker run -p 9090:9090 -d adobe/s3mock

import assert from 'node:assert';
import Docker from 'dockerode';

import { S3Client, CreateBucketCommand } from "@aws-sdk/client-s3";

const client = new S3Client({
  region: 'auto',
  endpoint:  'http://localhost:9090',
  forcePathStyle: true,
  credentials: {
    accessKeyId: 'accessKeyId',
    secretAccessKey: 'secretAccessKey',
  }
});

describe('test', () => {
  it('build, start, bucket, stop, remove', function(done) {
    this.timeout(30000);
    const docker = new Docker();
    let testContainer;
    docker.createContainer({
      Image: 'adobe/s3mock',
      ExposedPorts: {
        "9090/tcp": {},
      },
      HostConfig: {
        PortBindings: {
          "9090/tcp": [{ HostPort: "9090" }],
        },
      },
    }).then((container) => {
      console.log('Container created');
      testContainer = container;
      return container.start();
    }).then(async (data) => {
      try {
        console.log('Container started');
        let cmd = new CreateBucketCommand({ Bucket: 'test' });
        let resp = await client.send(cmd);
        assert.strictEqual(resp.$metadata.httpStatusCode, 200);
      } catch(err) {
        assert.fail(err);
      }
      // Tests go here;
      console.log('Tests done');
      return data;
    }).then(() => {
      console.log('Container stopping');
      return testContainer.stop();
    }).then(() => {
      console.log('Container being removed');
      return testContainer.remove();
    }).then(() => {
      done();
    }).catch((err) => {
      if (testContainer) {
        testContainer.inspect()
          .then((data) => {
            if (data.State.Running) {
              testContainer.stop()
                .then(() => testContainer.remove())
                .then(() => done(err));
            }
          });
      }
    });
  });
});