gem源

Gemfile

 # frozen_string_literal: true
 
-source 'https://rubygems.org'
+source 'https://mirrors.tuna.tsinghua.edu.cn/rubygems/'
 
 if ENV.fetch('BUNDLER_CHECKSUM_VERIFICATION_OPT_IN', 'false') != 'false' # this verification is still experimental
   $LOAD_PATH.unshift(File.expand_path("vendor/gems/bundler-checksum/lib", __dir__))