"Could not kill process on port" in Alpine based docker images (fix suggestion)

[FedericoBiccheddu]

Using this package in order to solve a problem with Node.js --inspect in the official alpine docker image, I receive that error message.

I solved this problem using the following command:
netstat -lnpt | awk '$4 ~ /:PORT$/ {sub(/\/.*/, "", $7); print $7}'
but i don't know if can be used in other circumstances.

EDIT: another solution compatible with npm/yarn scripts is:
netstat -lnpt | awk '$4 ~ /:PORT$/ {print $7}' | cut -d'/' -f1
so can be used like:

{
  "scripts": {
    "dev:inspect:port": "netstat -lnpt | awk '$4 ~ /:PORT$/' | awk '{print $7}' | cut -d'/' -f1"
}