Initial Run Problem: "can't find executable foreman for gem foreman."

[greece57]

I'm trying to setup fastlane/ci by following the tutorial on my Mac. When following all steps and running
bundle exec rake prod
I get the following error:

rake aborted!
foreman is now required for process management. sudo gem install foreman
/Users/quickbird/Documents/ci/Rakefile:13:in block in <top (required)>' /Library/Ruby/Gems/2.3.0/gems/rake-12.3.1/exe/rake:27:in <top (required)>'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli/exec.rb:74:in load' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli/exec.rb:74:in kernel_load'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli/exec.rb:28:in run' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli.rb:424:in exec'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/vendor/thor/lib/thor/command.rb:27:in run' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in invoke_command'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/vendor/thor/lib/thor.rb:387:in dispatch' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli.rb:27:in dispatch'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/vendor/thor/lib/thor/base.rb:466:in start' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli.rb:18:in start'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/exe/bundle:30:in block in <top (required)>' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/friendly_errors.rb:124:in with_friendly_errors'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/exe/bundle:22:in <top (required)>' /usr/local/bin/bundle:23:in load'
/usr/local/bin/bundle:23:in `

'
Tasks: TOP => prod

After installing foreman with sudo gem install foreman and then running bundle exec run prod again I get the following error:

rake aborted!
foreman is now required for process management. sudo gem install foreman
/Users/quickbird/Documents/ci/Rakefile:13:in block in <top (required)>' /Library/Ruby/Gems/2.3.0/gems/rake-12.3.1/exe/rake:27:in <top (required)>'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli/exec.rb:74:in load' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli/exec.rb:74:in kernel_load'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli/exec.rb:28:in run' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli.rb:424:in exec'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/vendor/thor/lib/thor/command.rb:27:in run' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in invoke_command'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/vendor/thor/lib/thor.rb:387:in dispatch' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli.rb:27:in dispatch'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/vendor/thor/lib/thor/base.rb:466:in start' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli.rb:18:in start'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/exe/bundle:30:in block in <top (required)>' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/friendly_errors.rb:124:in with_friendly_errors'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/exe/bundle:22:in <top (required)>' /usr/local/bin/bundle:23:in load'
/usr/local/bin/bundle:23:in `

'
Tasks: TOP => prod

Can anybody help me setting it up?

[MishkaTheCub]

In my case I get this error after installing foreman:

foreman start
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/rubygems_integration.rb:462:in block in replace_bin_path': can't find executable foreman for gem foreman. foreman is not currently included in the bundle, perhaps you meant to add it to your Gemfile? (Gem::Exception) from /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/rubygems_integration.rb:493:in block in replace_bin_path'
from /usr/local/bin/foreman:22:in <main>' rake aborted! Command failed with status (1): [foreman start...] /Users/test/ci/Rakefile:15:in block in <top (required)>'
/Library/Ruby/Gems/2.3.0/gems/rake-12.3.1/exe/rake:27:in <top (required)>' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli/exec.rb:74:in load'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli/exec.rb:74:in kernel_load' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli/exec.rb:28:in run'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli.rb:424:in exec' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/vendor/thor/lib/thor/command.rb:27:in run'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/vendor/thor/lib/thor/invocation.rb:126:in invoke_command' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/vendor/thor/lib/thor.rb:387:in dispatch'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli.rb:27:in dispatch' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/vendor/thor/lib/thor/base.rb:466:in start'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/cli.rb:18:in start' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/exe/bundle:30:in block in <top (required)>'
/Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/lib/bundler/friendly_errors.rb:124:in with_friendly_errors' /Library/Ruby/Gems/2.3.0/gems/bundler-1.16.3/exe/bundle:22:in <top (required)>'
/usr/local/bin/bundle:22:in load' /usr/local/bin/bundle:22:in

'
Tasks: TOP => prod

(See full trace by running task with --trace)

[greece57]

I get the same error as @MishkaTheClub but I failed when copy pasting it