Example running golang application using pm2, if you don't want to use this concept, alternative you can use this pm2go or pm2-io-apm-go, for pm2 config reference check here.
If you found error like this, when you run command docker logs <container id> ignore this error, make sure your app is running or not typing command docker exec -it <container id> sh in your terminal and if you already inside container typing command like this pm2 ls and pm2 monit, for make sure your app is running or check this article for resolve this issue here, if you lauch app using docker-compose change network address like this lc.Listen(context.Background(), "tcp", "<service name>", "3000").
[antimalware@antimalware go-pm2]$ docker logs 8e00
2022-11-06T08:12:42: PM2 log: Launching in no daemon mode
2022-11-06T08:12:42: PM2 log: App [golang-app:0] starting in -cluster mode-
2022-11-06T08:12:42: PM2 log: App [golang-app:0] online
2022-11-06T08:12:42: PM2 log: App [golang-app:1] starting in -cluster mode-
2022-11-06T08:12:42: PM2 log: App [golang-app:1] online
2022-11-06T08:12:42: PM2 log: App [golang-app:2] starting in -cluster mode-
2022-11-06T08:12:42: PM2 log: App [golang-app:2] online
2022-11-06T08:12:42: PM2 log: App [golang-app:3] starting in -cluster mode-
Golang application error Error: Command failed: ./main
2022/11/06 08:12:42 Server listening error listen tcp :4000: bind: address already in use
2022-11-06T08:12:42: PM2 log: App [golang-app:3] online
2022-11-06T08:12:42: PM2 log: App [golang-app:4] starting in -cluster mode-
2022-11-06T08:12:42: PM2 log: App [golang-app:4] online
2022-11-06T08:12:42: PM2 log: App [golang-app:5] starting in -cluster mode-
Golang application error Error: Command failed: ./main
2022/11/06 08:12:42 Server listening error listen tcp :4000: bind: address already in use
2022-11-06T08:12:42: PM2 log: App [golang-app:5] online
2022-11-06T08:12:42: PM2 log: App [golang-app:6] starting in -cluster mode-
Golang application error Error: Command failed: ./main
2022/11/06 08:12:42 Server listening error listen tcp :4000: bind: address already in use
2022-11-06T08:12:42: PM2 log: App [golang-app:6] online
2022-11-06T08:12:42: PM2 log: App [golang-app:7] starting in -cluster mode-
2022-11-06T08:12:42: PM2 log: App [golang-app:7] online
2022-11-06T08:12:42: PM2 log: App [golang-app:8] starting in -cluster mode-
Golang application error Error: Command failed: ./main
2022/11/06 08:12:42 Server listening error listen tcp :4000: bind: address already in use
2022-11-06T08:12:42: PM2 log: App [golang-app:8] online
2022-11-06T08:12:42: PM2 log: App [golang-app:9] starting in -cluster mode-
Golang application error Error: Command failed: ./main
2022/11/06 08:12:42 Server listening error listen tcp :4000: bind: address already in use
2022-11-06T08:12:42: PM2 log: App [golang-app:9] online
2022-11-06T08:12:42: PM2 log: App [golang-app:10] starting in -cluster mode-
Golang application error Error: Command failed: ./main
2022/11/06 08:12:42 Server listening error listen tcp :4000: bind: address already in use
2022-11-06T08:12:42: PM2 log: App [golang-app:10] online
2022-11-06T08:12:42: PM2 log: App [golang-app:11] starting in -cluster mode-
Golang application error Error: Command failed: ./main
2022/11/06 08:12:42 Server listening error listen tcp :4000: bind: address already in use
2022-11-06T08:12:43: PM2 log: App [golang-app:11] online
Golang application error Error: Command failed: ./main
2022/11/06 08:12:43 Server listening error listen tcp :4000: bind: address already in use
Golang application error Error: Command failed: ./main
2022/11/06 08:12:43 Server listening error listen tcp :4000: bind: address already in use
Golang application error Error: Command failed: ./main
2022/11/06 08:12:43 Server listening error listen tcp :4000: bind: address already in use
Golang application error Error: Command failed: ./main
2022/11/06 08:12:43 Server listening error listen tcp :4000: bind: address already in use
[antimalware@antimalware go-pm2]$ 
