https://studygolang.com/articles/12670
参考的这篇文章。踩了几个坑。
这里配上成功的流程：

1. 创建工程

mkdir helloWorldDocker
cd helloWorldDocker

2. 创建main.go文件

package main
import (
    "fmt"
    "net/http"
)
func main() {
    fmt.Println("abc")
    http.HandleFunc("/", homePage)
    http.HandleFunc("/login", login)
    _ = http.ListenAndServe(":80", nil)
}
func homePage(w http.ResponseWriter, r *http.Request) {
    fmt.Println("Hello Docker")
}
func login(w http.ResponseWriter, r *http.Request) {
    fmt.Println("Login Docker")
}

3 在helloWorldDocker下创建Dockerfile

FROM golang:latest
WORKDIR $GOPATH/src/helloWorldDocker
COPY . $GOPATH/src/helloWorldDocker
RUN go build .
EXPOSE 8080
ENTRYPOINT ["./helloWorldDocker"]

4 返回上级目录

cd ../

5 docker编译你的项目-注意docker的命名不能有大写

docker build -t hellow ./helloWorldDocker

Sending build context to Docker daemon  14.34kB
Step 1/6 : FROM golang:latest
 ---> 54e71dcafb7c
Step 2/6 : WORKDIR $GOPATH/src/helloWorldDocker
 ---> Using cache
 ---> fcf23a94eb82
Step 3/6 : COPY . $GOPATH/src/helloWorldDocker
 ---> 72aa02c9ebe4
Step 4/6 : RUN go build .
 ---> Running in 9ff4b85593b2
Removing intermediate container 9ff4b85593b2
 ---> d8a47e47f37a
Step 5/6 : EXPOSE 8080
 ---> Running in c41b4f3394c0
Removing intermediate container c41b4f3394c0
 ---> e8842a313901
Step 6/6 : ENTRYPOINT ["./hellow"]
 ---> Running in 6e5729ec5078
Removing intermediate container 6e5729ec5078
 ---> 7c045fb4a075
Successfully built 7c045fb4a075
Successfully tagged hellow:latest

6 docker 上运行项目

 docker run -p 8080:80 hellow 

 abc

7 http访问

http://127.0.0.1:808/login

Login Docker
Hello Docker