Update cheatsheets

tldr/rails-console

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# rails console
+
+> Interact with a Rails application.
+> More information: <https://guides.rubyonrails.org/command_line.html#bin-rails-console>.
+
+- Start the Rails console:
+
+`rails console`
+
+- Start the Rails console and roll back all data modifications on exit:
+
+`rails console --sandbox`
+
+- Start the Rails console on a specified environment:
+
+`rails console --environment {{dev|test|production|...}}`
+
+- Display help:
+
+`rails console --help`

tldr/rails-new

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# rails new
+
+> Create a new Rails application.
+> More information: <https://guides.rubyonrails.org/command_line.html#rails-new>.
+
+- Create a Rails app named `blog` in the current directory:
+
+`rails new blog`
+
+- Create a Rails app with API-only configuration:
+
+`rails new {{app_name}} --api`
+
+- Create a Rails app with `postgresql` as the database:
+
+`rails new {{app_name}} --database postgresql`
+
+- Create a Rails app without generating JavaScript files:
+
+`rails new {{app_name}} --skip-javascript`
+
+- Display help:
+
+`rails new --help`

tldr/rails-server

@@ -0,0 +1,29 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# rails server
+
+> Serve the Rails app in the current directory using the Puma web server, which comes bundled with Rails.
+> More information: <https://guides.rubyonrails.org/command_line.html#bin-rails-server>.
+
+- Run the web server:
+
+`rails server`
+
+- Run the web server on a specified port:
+
+`rails server --port {{port_number}}`
+
+- Run the web server on a specified IP address:
+
+`rails server --binding {{ip_address}}`
+
+- Run the web server on a specified environment:
+
+`rails server --environment {{environment}}`
+
+- Display help:
+
+`rails server --help`