Docker自制golang版helloworld

[email protected]:~ $ cat hello.go
package main

import "fmt"

func main() {
    fmt.Println("hello world")
}

[email protected]:~ $ go  build hello.go
[email protected]:~ $ ./hello 
hello world
[email protected]:~ $ mkdir gohello
[email protected]:~ $ cp hello gohello/
[email protected]:~ $ cd  gohello/
[email protected]:~/gohello $ ls
hello
[email protected]:~/gohello $ vim Dockerfile
[email protected]:~/gohello $ docker build -t myhello:latest .
Sending build context to Docker daemon  2.012MB
Step 1/3 : FROM scratch
 ---> 
Step 2/3 : COPY hello /
 ---> ca4b658b1549
Step 3/3 : CMD ["/hello"]
 ---> Running in 2ebeeef54814
Removing intermediate container 2ebeeef54814
 ---> bd91ff0fe143
Successfully built bd91ff0fe143
Successfully tagged myhello:latest
[email protected]:~/gohello $ docker image  ls
REPOSITORY                                                  TAG                 IMAGE ID            CREATED             SIZE
myhello                                                     latest              bd91ff0fe143        4 seconds ago       2.01MB
ubunt[email protected]:~/gohello $ docker container run myhello
hello world