Docker Go Sample

app.go

package main

import (
	"fmt"
	"log"
	"net/http"
	"os"

	"github.com/gorilla/mux"
)

func main() {
	r := mux.NewRouter()
	r.HandleFunc("/", Hello)
	http.Handle("/", r)
	fmt.Println("Starting up on 8080")
	log.Fatal(http.ListenAndServe(":8080", nil))
}

func Hello(w http.ResponseWriter, req *http.Request) {
	if value, ok := os.LookupEnv("ENV"); ok {
		fmt.Fprintln(w, "Hello World, in ", value)
	} else {
		fmt.Fprintln(w, "Hello world! in, ", "development")
	}
}

Dockerfile

FROM golang:1.8.6-alpine3.5

WORKDIR /app

ADD go-docker /app/

ENTRYPOINT ["./go-docker"]

Makefile

build:
	go get github.com/gorilla/mux
	go build -o go-docker

pack:
	docker build --no-cache -t ellation/docker-app .

run:
	docker run --rm -p 8080:8080 ellation/docker-app