root@server:~/docker# docker container run -it -p 9000:8000 --name echo1 -d example/echo:latest
e2c45c8b92f9c2196b9fbc2bcca10b777384e6ab3f332778116a350ce41bb97e

root@server:~/docker# docker container run -it -p 9001:8000 --name echo2 -d example/echo:latest
0371d5eb3d1ed93dfb7408266775781dcdac37e5113b3074d9d43262f2200d6f
root@server:~/docker# docker container ps
CONTAINER ID        IMAGE                 COMMAND                  CREATED             STATUS              PORTS                    NAMES
0371d5eb3d1e        example/echo:latest   "go run /echo/main.go"   8 seconds ago       Up 7 seconds        0.0.0.0:9001->8000/tcp   echo2
e2c45c8b92f9        example/echo:latest   "go run /echo/main.go"   48 seconds ago      Up 47 seconds       0.0.0.0:9000->8000/tcp   echo1