JST on Alpine Linux with Docker

build.sh

GOOS=linux GOARCH=amd64 go build -o time-test
docker build -t jst-time-test1 -f Dockerfile1 .
docker build -t jst-time-test2 -f Dockerfile2 .
docker build -t jst-time-test3 -f Dockerfile3 .

Dockerfile1

FROM alpine:latest

COPY ["time-test", "/"]
CMD [ "/time-test" ]

Dockerfile2

FROM alpine:latest

RUN apk --no-cache add tzdata && \
    cp /usr/share/zoneinfo/Asia/Tokyo /etc/localtime && \
    apk del tzdata
COPY ["time-test", "/"]
CMD [ "/time-test" ]

Dockerfile3

FROM alpine:latest

RUN apk --no-cache add tzdata && \
    cp /usr/share/zoneinfo/Asia/Tokyo /etc/localtime
COPY ["time-test", "/"]
CMD [ "/time-test" ]

main.go

package main

import (
	"fmt"
	"time"
)

func main() {
	t := time.Now()
	fmt.Println(t)

	jst, _ := time.LoadLocation("Asia/Tokyo")
	fmt.Println(t.In(jst))
}

result.log

$ docker run --rm jst-time-test1
2018-08-29 10:20:04.5279391 +0000 UTC m=+0.000194801
panic: time: missing Location in call to Time.In

goroutine 1 [running]:
time.Time.In(0xbed9bab51f77b61c, 0x2f8f1, 0x53ab80, 0x0, 0xc42000e1e0, 0x0, 0xc42000e1c0)
        /usr/local/Cellar/go/1.9.2/libexec/src/time/time.go:1073 +0xc0
main.main()
        /Users/kawano.kentaro/projects/src/github.com/kawaken/jst-docker/main.go:13 +0x111

$ docker run --rm jst-time-test2
2018-08-29 19:20:08.4511553 +0900 JST m=+0.000270001
panic: time: missing Location in call to Time.In

goroutine 1 [running]:
time.Time.In(0xbed9bab61ae41564, 0x41eb1, 0x53ab80, 0x0, 0xc42000e1e0, 0x0, 0xc42000e1c0)
        /usr/local/Cellar/go/1.9.2/libexec/src/time/time.go:1073 +0xc0
main.main()
        /Users/kawano.kentaro/projects/src/github.com/kawaken/jst-docker/main.go:13 +0x111

$ docker run --rm jst-time-test3
2018-08-29 19:20:10.9607839 +0900 JST m=+0.000242201
2018-08-29 19:20:10.9607839 +0900 JST