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# Type of request: This is a ...

[x ] bug report
[ ] feature request

# Detailed description

Not able to use the edge service to write metric data to cloudwatch via the javascript aws-sdk.

However, It **DOES** work when using the deprecated cloudwatch port.

## Expected behavior

Metric data to be visible when calling `awslocal cloudwatch list-metrics`

## Actual behavior

404 from edge service. No metric data is persisted, localstack instance logs the following info:

```
INFO:localstack.services.edge: Unable to determine forwarding port for API "monitoring" - please make sure this API is enabled via the SERVICES configuration
```

# Steps to reproduce

Run JS code in "Client code" section.
See 404 Error

## Command used to start LocalStack

`TMPDIR=/tmp/localstack docker-compose up`

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

```js
const AWS = require('aws-sdk')
const cw = new AWS.CloudWatch({
  endpoint: 'http://localhost:4566',
})

const data = {
  Namespace: 'ns',
  MetricData: [
    {
      MetricName: 'metric-name',
      Timestamp: new Date(),
      Value: 12345,
      Unit: 'Milliseconds',
      Dimensions: [
        { Name: 'Environment', Value: 'local' },
      ]
    }
  ]
}

cw.putMetricData(data, (err, data) => {
  if (err) {
      console.log('Error', err)
  } else {
      console.log('Success', JSON.stringify(data))
  }
})
```

if not port:
        port = config.EDGE_PORT
    if config.EDGE_PORT_HTTP:
        do_start_edge(config.EDGE_PORT_HTTP, use_ssl=False, asynchronous=True)
    if port > 1024 or is_root():
        return do_start_edge(port, use_ssl, asynchronous=asynchronous)
    
    class Terminator(object):
        def stop(self, quiet=True):
            try:
                url = 'http%s://localhost:%s' % ('s' if use_ssl else '', port)
                requests.verify_ssl = False
                requests.post(url, headers={HEADER_KILL_SIGNAL: 'kill'})
            except Exception:
                pass
    
    ensure_can_use_sudo()
    
    TMP_THREADS.append(Terminator())
    
    sudo_cmd = 'sudo '
    python_cmd = sys.executable
    cmd = '%sPYTHONPATH=.:%s %s %s %s' % (sudo_cmd, LOCALSTACK_ROOT_FOLDER, python_cmd, __file__, port)
    process = run(cmd, asynchronous=asynchronous)
    return process
if __name__ == '__main__':
    logging.basicConfig()
    start_edge(int(sys.argv[1]))