go+docker

Dockerfile

FROM golang:1.16.6-alpine
WORKDIR /go/src/app
COPY main.go go.mod /go/src/app/
RUN go build

FROM alpine:latest  
EXPOSE 8080
RUN apk --no-cache add ca-certificates
WORKDIR /root/
COPY --from=0 /go/src/app/app ./
CMD ["./app"]  

go.mod

module app

go 1.16

main.go

package main

import (
	"net/http"
	"fmt"
)

func main() {
	http.ListenAndServe(":8080", http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		fmt.Fprintln(w, "hello world")
	}))
}