Error installing puma: ERROR: Failed to build gem native extension · Issue #2328 · puma/puma · GitHub
An error occurred while installing puma (4.3.5), and Bundler cannot continue. Make sure that `gem install puma -v '4.3.5' --source 'https://rubygems.org/'` succeeds before bundling. · Issue #2342 · puma/puma · GitHub
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Deploy Rails 5.2 to Amazon EC2 with Puma, Nginx and Capistrano 3 for multiple environments – Colin Dao
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