在 Alpine Linux Docker 的路径中找不到安装的 Go 二进制文件

我有一个围棋二进制程序，我正在阿尔卑斯 docker 图像上运行.

这对Docker Go binary很好用.

docker run -it alpine:3.3 sh
apk add --no-cache curl

DOCKER_BUCKET=get.docker.com
DOCKER_VERSION=1.9.1
curl -fSL "https://${DOCKER_BUCKET}/builds/Linux/x86_64/docker-$DOCKER_VERSION" -o /usr/local/bin/docker
chmod +x /usr/local/bin/docker
docker help
Usage: docker [OPTIONS] COMMAND [arg...]
...

然而，对于Go二进制，我想安装.

RACK_BUCKET=ec4a542dbf90c03b9f75-b342aba65414ad802720b41e8159cf45.ssl.cf5.rackcdn.com
RACK_VERSION=1.1.0-beta1
curl -fSL "https://${RACK_BUCKET}/${RACK_VERSION}/Linux/amd64/rack" -o /usr/local/bin/rack
chmod +x /usr/local/bin/rack

rack help
sh: rack: not found

/usr/local/bin/rack help
sh: /usr/local/bin/rack: not found

ls -al /usr/local/bin/
total 43375
drwxr-xr-x    2 root     root          1024 Jan 11 18:10 .
drwxr-xr-x    8 root     root          1024 Jan 11 18:09 ..
-rwxr-xr-x    1 root     root      30222575 Jan 11 18:09 docker
-rwxr-xr-x    1 root     root      14190576 Jan 11 18:10 rack

which rack
/usr/local/bin/rack

我认为这可能与this answer有关，但我在运行ldd时没有遇到同样的错误.

ldd /usr/local/bin/rack
    /lib64/ld-linux-x86-64.so.2 (0x7fdd15cd0000)
    libpthread.so.0 => /lib64/ld-linux-x86-64.so.2 (0x7fdd15cd0000)
    libc.so.6 => /lib64/ld-linux-x86-64.so.2 (0x7fdd15cd0000)

在Alpine Linux Docker上的path中找不到关于这个安装的Go二进制文件的任何 idea ？