Error while using 'rails server' command

I have installed Ruby on Rails using railsinstaller-3.2.0 [Ruby version:2.2.4 ,Rails version : 5.0.0.1].
Error facedWhenever I Run 'rails server' command I confront an error report like [Could not find gem 'uglifier (>= 1.3.0) x86-mingw32' in any of the gem sources listed in your Gemfile or available on this machine.].Even if Install the required gem new error is raised for another missing gem . How can I solve this issue , How can I install all the missing gems ?