Launch binder not working

[lokeshh]

Launch binder button on README redirects to https://mybinder.org/v2/gh/SciRuby/sciruby-notebooks/master which result in following error:

Step 10/20 : RUN gem update --no-document --system && gem install --no-documentsciruby-full
 ---> Running in 626818be019a
ERROR:  Error installing rubygems-update:
        rubygems-update requires Ruby version >= 2.3.0.
ERROR:  While executing gem ... (NoMethodError)
    undefined method `version' for nil:NilClass
Updating rubygems-update
Removing intermediate container 626818be019a
The command '/bin/sh -c gem update --no-document --system && gem install --no-document sciruby-full' returned a non-zero code: 1Error during build: __init__() missing 1 required positional argument: 'build_log'