title: '/bin/sh: go: not found' in 'docker:dind' container
body: <p>I try to install <code>Golang</code> (go1.13.9.linux-amd64) in docker-in-docker container(<code>docker:dind</code>) manually (copy <code>go</code> binaries to a container).</p>
  <p><code>Go</code> was copied to <code>/go/bin</code>,</p>
  <pre><code>/ # export GOROOT=/go
  / # export PATH=$GOROOT/bin:$PATH
  / # 
  / # uname -a
  Linux 41868f6e7ae3 4.19.76-linuxkit #1 SMP Tue May 26 11:42:35 UTC 2020 x86_64 Linux
  / #
  / # echo $GOROOT
  /go
  / #
  / # echo $PATH
  /go/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
  
  </code></pre>
  <p>I try check version and get an error:</p>
  <pre><code>/ # go version
  /bin/sh: go: not found
  </code></pre>
  <p>I try add <code>env</code> to <code>/etc/profile</code>  the same error.</p>