# Getting started
## Intro
To start, open Quickstart page [localhost:8020](http://localhost:8020/) for quick access to all the tools
From the quicklaunch page you can open workspace tools, such as code editor or terminal
Demo: Workspace UI
The main code editor of this workspace is [Code-server](https://github.com/cdr/code-server)
Demo: Code-server
Workspace has full-size browser-base terminal
## Ruby
Check Ruby version
```
ruby -v
```
Install Rails - a web application development framework written in the Ruby programming language.
```
gem install rails
```
Check version
```
rails --version
```
## Bundler
Create file `Gemfile` with the following content
```
source 'https://rubygems.org'
gem 'nokogiri'
gem 'rack', '~> 2.0.1'
gem 'rspec'
```
Install all of the required gems
```
bundle install
```
## Rbenv
Use [rbenv](https://github.com/rbenv/rbenv) to pick a Ruby version for your application and guarantee that your development environment matches production.
List available versions, and install another one
```
rbenv install --list
rbenv install 3.0.4
```
Lists all Ruby versions known to rbenv, and shows an asterisk next to the currently active version.
```
rbenv versions
```
__global environment__
Change global Ruby (for all folders)
```
rbenv global 3.0.4
```
__local environment (specific folder)__
Chose local Ruby environment for this specific folder
```
rbenv local 3.0.4
```
## Basic example
Create file `http_server.rb`
```rb
# http_server.rb
require 'socket'
server = TCPServer.new 8030
while session = server.accept
request = session.gets
puts request
session.print "HTTP/1.1 200\r\n" # 1
session.print "Content-Type: text/html\r\n" # 2
session.print "\r\n" # 3
session.print "Hello world! The time is #{Time.now}" #4
session.close
end
```
Serve simple server
```
ruby http_server.rb
```
Open browser on [localhost:8030](http://localhost:8030/)