If this is an existing app then for gems just run bundle install and it will install the version specified in Gemfile.lock If you are upgrading then you can look at the gems changelog and see if you need to update it.
Coln
If this is an existing app then for gems just run bundle install and it will install the version specified in Gemfile.lock If you are upgrading then you can look at the gems changelog and see if you need to update it.
Coln
If I want to use rails 5