fix(tutos): sinatra

Author: ldecarvalho-doc

tutorials/sinatra/index.mdx

@@ -9,13 +9,14 @@ tags: ansible Sinatra Ruby RubyGems
 categories:
   - instances
 dates:
-  validation: 2024-10-29
+  validation: 2025-05-14
   posted: 2018-08-17
 ---
 
 Sinatra is a lightweight domain-specific programming language and web application library that is used for writing web applications.
 
 It provides a faster and simpler alternative to Ruby frameworks such as Ruby on Rails. Sinatra is written in [Ruby](https://www.ruby-lang.org/en/) and the code for Sinatra applications will be written in Ruby too.
+
 Sinatra routes browser requests to code that can handle those requests. Then it will render templates back to the browser as a response. For more information on Sinatra, refer to the [official documentation](http://sinatrarb.com/documentation.html).
 
 To use Sinatra, we need to install three pieces of software: Ruby, RubyGems, and Sinatra. Sinatra depends on Ruby and RubyGems.
@@ -31,54 +32,45 @@ To use Sinatra, we need to install three pieces of software: Ruby, RubyGems, and
 
 The easiest way to install Ruby and RubyGems is using the Ruby Version Manager (RVM). RVM allows you to have multiple Rubies, with their own sets of gems (gemsets), installed.
 
-
- ```
+1. Update the APT package cache.
+```
 apt update
 ```
-1. (Optional) Install `nodejs`, `gunpg2`, `ruby`, and `curl`. When using Rails, you must install Node.js, in any version you want. The asset pipeline compiler of Rails requires a JavaScript runtime. If you do not use Rails, skip this and proceed to the next step.
+2. Install `nodejs`, `gunpg2`, `ruby`, and `curl`. When using Rails, you must install Node.js, in any version you want. The asset pipeline compiler of Rails requires a JavaScript runtime. If you do not use Rails, skip this and proceed to the next step.
     ```
     apt install gnupg2 nodejs curl ruby
     ```
-2. Import the signing key to be able to verify the RVM packages downloaded in the later step.
+3. Import the signing key to be able to verify the RVM packages downloaded in the later step.
     ```
     gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB
     ```
-3. Install Ruby Version Manager along with a stable Ruby version.
+4. Install Ruby Version Manager along with a stable Ruby version.
     ```
     \curl -sSL https://get.rvm.io | bash -s stable
     ```
-4. Update your shell environment to be able to access Ruby.
+5. Update your shell environment to be able to access Ruby.
     ```
     source /usr/local/rvm/scripts/rvm
     ```
-5. Confirm that Ruby is installed.
+6. Confirm that Ruby is installed.
     ```
     ruby -v
-    ruby 3.0.2p107 (2021-07-07 revision 0db68f0233) [x86_64-linux-gnu]
     ```
 
 ## Installing Sinatra
 
-Install Sinatra just as any other gem
+Install Sinatra as a gem.
 
 ```
 gem install sinatra
-```
-
-which returns
-
-```
-Successfully installed sinatra-4.0.0
-Parsing documentation for sinatra-4.0.0
-Done installing documentation for sinatra after 1 seconds
-1 gem installed
+gem install rackup puma
 ```
 
 ## Creating your first Sinatra Application
 
 1. Create a new file that you can call `testapp.rb`.
     ```
-    nano testapp.rbna
+    nano testapp.rb
     ```
 2. Paste the following:
     ```
@@ -91,6 +83,7 @@ Done installing documentation for sinatra after 1 seconds
 3.  Run your Sinatra application. The `-o 0.0.0.0` parameter will bind the application to all interfaces of the server. Without this parameter, it will only be accessible from your localhost.
     ```
     ruby testapp.rb -o 0.0.0.0
+
     [2023-03-27 16:36:07] INFO  WEBrick 1.4.4
     [2023-03-27 16:36:07] INFO  ruby 2.6.10 (2022-04-12)
     == Sinatra (v3.0.4) has taken the stage on 4567 for development with backup from WEBrick
@@ -119,7 +112,7 @@ In the example above, The `get '/' do` part of the code is very important. It sa
       "Welcome to the index. It will help you find the information you need"
     end
     ```
-2. Run your little app.
+2. Run your app.
     ```
     ruby testapp.rb -o 0.0.0.0
     ```
@@ -144,8 +137,8 @@ Taking the same example as above, we will play a little more with the index. In
 
 ```
 get '/index' do
-  @songs = [{title: 'Charles Trenet, Le mer', url: "https://www.youtube.com/watch?v=qEkd1qWonj8"},
-            {title: 'Edith Piaf, Non je ne regrette rien', url: "https://www.youtube.com/watch?v=t6wjCcWC2aE"},
+  @songs = [{title: 'Charles Trenet, La mer', url: "https://www.youtube.com/watch?v=qEkd1qWonj8"},
+            {title: 'Edith Piaf, Non, je ne regrette rien', url: "https://www.youtube.com/watch?v=t6wjCcWC2aE"},
             {title: 'France Gall, Poupée de cire poupée de son', url: "https://www.youtube.com/watch?v=rRva0YOVtcI"},
             ]
   erb :default
@@ -174,7 +167,7 @@ The last line redirects to an ERB file which automatically looks for a file call
       <title>Famous French Chansons</title>
     </head>
     <body>
-      <h1>A list of the most loved chansons ever</h1>
+      <h1>A list of the most loved French chansons ever</h1>
       <% @songs.each do |song| %>
           <h3> <%= song[:title] %></h3>
           <p> <a href="<%=song[:url]%>"> Video </a></p>