Update README.md

Author: pedrofurtado

README.md

@@ -77,6 +77,29 @@ puts pix.base64
 
 🚨 Important note: BACEN (Banco Central do Brasil) sets a variety of rules for each field in QRCode Payload (maximum number of characters, invalid values, mandatory and optional fields, and so on). So, pay attention that a QRCode payload+base64 generated by the gem can be valid, theorically, but may not be accepted in banking apps because of these restrictions (that are out of scope of gem).
 
+## Execute tests/specs
+
+To execute gem tests locally, use Docker with the commands below:
+
+```bash
+git clone https://github.com/pedrofurtado/qrcode_pix_ruby
+cd qrcode_pix_ruby/
+docker build -t qrcode_pix_ruby_specs .
+
+# Then, run this command how many times you want,
+# after editing local files, and so on, to get
+# feedback from test suite of gem.
+docker run -v $(pwd):/app/ -it qrcode_pix_ruby_specs
+```
+
+## Demo
+
+It's provided a simple demo app, in Heroku, that uses the gem always in latest commit. You can check and test your QRCodes here:
+
+https://qrcode-pix-ruby.herokuapp.com
+
+🚨 Important note: The first page load can be slow, because of Heroku free tier. But don't worry, the demo works well 🤓
+
 ## Useful links
 
 * https://github.com/joseviniciusnunes/qrcode-pix
@@ -103,29 +126,6 @@ puts pix.base64
 * https://github.com/jesobreira/pixkey
 * https://github.com/pedrinholemes/pix-br
 
-## Execute tests/specs
-
-To execute gem tests locally, use Docker with the commands below:
-
-```bash
-git clone https://github.com/pedrofurtado/qrcode_pix_ruby
-cd qrcode_pix_ruby/
-docker build -t qrcode_pix_ruby_specs .
-
-# Then, run this command how many times you want,
-# after editing local files, and so on, to get
-# feedback from test suite of gem.
-docker run -v $(pwd):/app/ -it qrcode_pix_ruby_specs
-```
-
-## Demo
-
-It's provided a simple demo app, in Heroku, that uses the gem always in latest commit. You can check and test your QRCodes here:
-
-https://qrcode-pix-ruby.herokuapp.com
-
-🚨 Important note: The first page load can be slow, because of Heroku free tier. But don't worry, the demo works well 🤓
-
 ## Contributing
 
 Bug reports and pull requests are welcome on GitHub at https://github.com/pedrofurtado/qrcode_pix_ruby. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [code of conduct](https://github.com/pedrofurtado/qrcode_pix_ruby/blob/master/CODE_OF_CONDUCT.md).