Deploy first, debug later.

Deploy first, debug later.

Port Rescue Cheatsheet

What is using port 3000? (You.)

Tools/Reference

RelatedHTTP Status Lookup ETA / Business Days

Port 3000 — Next.js / React dev
```
netstat -ano | findstr :3000
```
Port 5432 — PostgreSQL
```
netstat -ano | findstr :5432
```
Port 6379 — Redis
```
netstat -ano | findstr :6379
```
Port 8080 — Alt HTTP / proxies
```
netstat -ano | findstr :8080
```

Then kill the PID if you dare: taskkill /PID (Windows) · kill -9 (Unix)