Can not install any gem

[shikhalev]

$ docker run -it rubinius/docker
root@bffae5abbfee:/# gem install rack
ERROR:  SSL verification error at depth 1: unable to get local issuer certificate (20)
ERROR:  You must add /C=BE/O=GlobalSign nv-sa/OU=Root CA/CN=GlobalSign Root CA to your local trusted store
ERROR:  While executing gem ... (OpenSSL::SSL::SSLError)
    SSL_connect returned=1 errno=0 state=SSLv3 read server certificate B: certificate verify failed
root@bffae5abbfee:/#

[medols]

On the rubinius/docker shell:

$ apt-get install wget
$ wget https://curl.haxx.se/ca/cacert.pem
$ mv cacert.pem /tmp
$ SSL_CERT_FILE=/tmp/cacert.pem
$ rbx -S gem install fresh-mc

Dockerfile example:

https://github.com/medols/fresh/blob/master/Dockerfile