diff --git a/Gemfile b/Gemfile
deleted file mode 100644
index 4e7a4358e056972e706d03860cf2609eed260b8a..0000000000000000000000000000000000000000
--- a/Gemfile
+++ /dev/null
@@ -1,25 +0,0 @@
-source 'https://gems.ruby-china.com'
-git_source(:github) { |repo| "https://github.com/#{repo}.git" }
-
-ruby '2.4.1'
-
-# Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
-gem 'rails', '~> 5.2.2'
-
-gem 'pg', '>= 0.18', '< 2.0'
-# Use Puma as the app server
-gem 'puma', '~> 3.11'
-# Use SCSS for stylesheets
-gem 'sass-rails', '~> 5.0'
-# Use Uglifier as compressor for JavaScript assets
-gem 'uglifier', '>= 1.3.0'
-# See https://github.com/rails/execjs#readme for more supported runtimes
-# gem 'mini_racer', platforms: :ruby
-
-gem 'bootsnap', '>= 1.1.0', require: false
-
-group :development do
-  # Access an interactive console on exception pages or by calling 'console' anywhere in the code.
-  gem 'listen', '>= 3.0.5', '< 3.2'
-	gem 'annotate', github: 'ctran/annotate_models'
-end
\ No newline at end of file
diff --git a/Gemfile.lock b/Gemfile.lock
index fa04232848896183cf2ebc8024614ae1765c812a..5ebae81b9c0c6d24d71ead5d860d6bcdc084f0cb 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -51,6 +51,8 @@ GEM
       minitest (~> 5.1)
       tzinfo (~> 1.1)
     arel (9.0.0)
+    awesome_nested_set (3.2.0)
+      activerecord (>= 4.0.0, < 7.0)
     bootsnap (1.4.0)
       msgpack (~> 1.0)
     builder (3.2.3)
@@ -80,10 +82,10 @@ GEM
     mini_portile2 (2.4.0)
     minitest (5.11.3)
     msgpack (1.2.6)
+    mysql2 (0.5.3)
     nio4r (2.3.1)
     nokogiri (1.10.1)
       mini_portile2 (~> 2.4.0)
-    pg (1.1.4)
     puma (3.12.0)
     rack (2.0.6)
     rack-test (1.1.0)
@@ -151,9 +153,10 @@ PLATFORMS
 
 DEPENDENCIES
   annotate!
+  awesome_nested_set
   bootsnap (>= 1.1.0)
   listen (>= 3.0.5, < 3.2)
-  pg (>= 0.18, < 2.0)
+  mysql2
   puma (~> 3.11)
   rails (~> 5.2.2)
   sass-rails (~> 5.0)
diff --git a/app/models/note.rb b/app/models/note.rb
new file mode 100644
index 0000000000000000000000000000000000000000..b6b1e5a072db5a2cd028198246ee15e1a2921714
--- /dev/null
+++ b/app/models/note.rb
@@ -0,0 +1,2 @@
+class Note < ApplicationRecord
+end
diff --git a/config/database.yml b/config/database.yml
index f5ce3e70a88016d04bbc761d7794efba4b915743..8fe05fd96dd95e931df418268cacf217a8a2f592 100644
--- a/config/database.yml
+++ b/config/database.yml
@@ -1,10 +1,29 @@
-default: &default
-  adapter: postgresql
-  encoding: unicode
+# default: &default
+#   adapter: postgresql
+#   encoding: unicode
+#   pool: 5
+#   username: postgres
+#   password: postgres
+
+# development:
+#   <<: *default
+#   database: gitos_development
+
+production:
+  adapter: mysql2
+  encoding: utf8
+  reconnect: false
+  database: gitos_development
   pool: 5
-  username: postgres
-  password: postgres
+  username: root
+  password: "root"
 
 development:
-  <<: *default
+  adapter: mysql2
+  encoding: utf8
+  reconnect: false
   database: gitos_development
+  pool: 5
+  username: root
+  password: "root"
+
diff --git a/test/fixtures/notes.yml b/test/fixtures/notes.yml
new file mode 100644
index 0000000000000000000000000000000000000000..80aed36e30b2598726b55a90c65850a8f9aeb609
--- /dev/null
+++ b/test/fixtures/notes.yml
@@ -0,0 +1,11 @@
+# Read about fixtures at http://api.rubyonrails.org/classes/ActiveRecord/FixtureSet.html
+
+# This model initially had no columns defined. If you add columns to the
+# model remove the '{}' from the fixture names and add the columns immediately
+# below each fixture, per the syntax in the comments below
+#
+one: {}
+# column: value
+#
+two: {}
+# column: value