Update cheatsheets

rails

@@ -0,0 +1,30 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# rails
+
+> A server-side MVC framework written in Ruby.
+> Some subcommands such as `rails generate` have their own usage documentation.
+> More information: <https://guides.rubyonrails.org/command_line.html>.
+
+- Create a new rails project:
+
+`rails new "{{project_name}}"`
+
+- Start local server for current project on port 3000:
+
+`rails server`
+
+- Start local server for current project on a specified port:
+
+`rails server -p "{{port}}"`
+
+- Open console to interact with application from command-line:
+
+`rails console`
+
+- Check current version of rails:
+
+`rails --version`