kill as server on a port code example
Example 1: kill app at port
#To list any process listening to the port 8080:
lsof -i:8080
#To kill any process listening to the port 8080:
kill $(lsof -t -i:8080)
#or more violently:
kill -9 $(lsof -t -i:8080)
Example 2: windows kill port
netstat -ano | findstr :3001
taskkill /PID <yourid> /F
Example 3: stop localhost server
netstat -ano | findstr :yourPortNumber
tskill typeyourPIDhere