<!-- Love localstack? Please consider supporting our collective:
👉  https://opencollective.com/localstack/donate -->

# Type of request: This is a ...

[x] bug report
[ ] feature request

# Detailed description

Using node.js AWS SDK function `getObject` returns object with `0` bytes using 4566 port. 
On port 4572 it works fine.

# Steps to reproduce

## Command used to start LocalStack

```
  localstack:
    image: localstack/localstack
    networks:
      - localstack-network
    ports:
      - 4566:4566
      - 4572:4572
      - 8080:8080
    environment:
      - DEBUG=1
      - HOSTNAME_EXTERNAL=localstack
      - SERVICES=sqs,lambda,cloudwatch,s3,iam,ec2,stepfunctions,cloudwatchlogs
      - LAMBDA_REMOTE_DOCKER=false
      - LAMBDA_EXECUTOR=docker
      - LAMBDA_DOCKER_NETWORK=localstack-network
      - AWS_ACCESS_KEY_ID=123
      - AWS_SECRET_ACCESS_KEY=xyz
      - DEFAULT_REGION=us-east-1
      - DOCKER_HOST=unix:///var/run/docker.sock
    volumes:
      - /var/run/docker.sock:/var/run/docker.sock
      - /tmp/localstack:/tmp/localstack
```

## Client code (AWS SDK code snippet, or sequence of "awslocal" commands)

```
export const s3 = new AWS.S3({
  endpoint: `http://localhost:4566`,
  s3ForcePathStyle: true,
  sslEnabled: false
});

const { Body } = await s3.getObject({
 Bucket: 'bucket',
 Key: 'file.json'
}).promise();
```
return config.service_port(service)
def do_start_edge(port, use_ssl, asynchronous=False):
    try:
        
        from localstack_ext.services import dns_server
        dns_server.start_servers()
    except Exception:
        pass
    
    print('Starting edge router (http%s port %s)...' % ('s' if use_ssl else '', port))
    
    proxy = start_proxy_server(port, use_ssl=True, update_listener=ProxyListenerEdge())
    if not asynchronous:
        proxy.join()
    return proxy
def can_use_sudo():
    try:
        run('echo | sudo -S echo', print_error=False)
        return True
    except Exception:
        return False
def ensure_can_use_sudo():
    if not is_root() and not can_use_sudo():
        print('Please enter your sudo password (required to configure local network):')
        run('sudo echo', stdin=True)
def start_edge(port=None, use_ssl=True, asynchronous=False):