add Postgres

Gemfile

@@ -9,6 +9,8 @@ gem 'rails', '6.0.3.4'
 gem 'mysql2'
 # Use Puma as the app server
 
+gem "postgresql"
+
 # Use SCSS for stylesheets
 gem 'sass-rails', '~> 5'
 # Transpile app-like JavaScript. Read more: https://github.com/rails/webpacker

Gemfile.lock

@@ -229,7 +229,10 @@ GEM
     nio4r (2.5.4)
     nokogiri (1.10.10)
       mini_portile2 (~> 2.4.0)
+    pg (1.2.3)
     posix-spawn (0.3.13)
+    postgresql (1.0.0)
+      pg
     public_suffix (4.0.1)
     puma (3.12.1)
     rack (2.2.3)
@@ -386,6 +389,7 @@ DEPENDENCIES
   mysql2
   nokogiri
   posix-spawn
+  postgresql
   puma (~> 3.11)
   rails (= 6.0.3.4)
   rails_autolink

config/database.yml

@@ -14,9 +14,10 @@ default: &default
     sql_mode: TRADITIONAL
 
 development:
-  <<: *default
-  username: root
-  socket: /tmp/mysql.sock
+  adapter: postgresql
+  database: presta_app
+  pool: 5
+  username: postgres
 
 # Warning: The database defined as "test" will be erased and
 # re-generated from your development database when you run "rake".