Dockerfile

FROM golang:1.9 as builder

COPY main.go /tmp
RUN cd /tmp && \
  go get -d github.com/Sirupsen/logrus && \
  CGO_ENABLED=0 GOOS=linux \
  go build -a \
  -installsuffix cgo -o entrypoint main.go


FROM scratch
COPY --from=builder /tmp/entrypoint /entrypoint

ENTRYPOINT [ "/entrypoint" ]

EXPOSE 8080

main.go

package main

import (
	"fmt"
	"net/http"

	"github.com/Sirupsen/logrus"
)

type student struct {
	Name string
	Age  int
}

func handler(w http.ResponseWriter, r *http.Request) {
	s := student{
		Name: "Foo",
		Age:  42,
	}
	logrus.Debugf("Printing info on student %s", s.Name)
	fmt.Fprintf(w, "<h1>hello, %s</h1><br />You are %v years old.\n", s.Name, s.Age)
}

func main() {
	http.HandleFunc("/", handler)
	logrus.Info("Listening on port 8080")
	http.ListenAndServe(":8080", nil)
}