It started like any other debugging session. I had my usual suspects running: localhost:3000 for the frontend, localhost:5000 for the API, and localhost:5432 for the database. But when I ran lsof -i to free up a port, something unexpected caught my eye:
Look for anything unusual. Then trace the PID: localhost 11501 new
Software engineers often use custom ports like 11501 to run local REST or GraphQL APIs, microservices, or dashboard tools while they are still in the "new" development phase. It started like any other debugging session
If you haven't set it up yet but want to, here are the standard methods: localhost:5000 for the API