Update gemfile database group

Gemfile

@@ -5,8 +5,6 @@ ruby '2.6.6'
 
 # Bundle edge Rails instead: gem 'rails', github: 'rails/rails'
 gem 'rails', '~> 6.0.3', '>= 6.0.3.2'
-# Use sqlite3 as the database for Active Record
-gem 'sqlite3', '~> 1.4'
 # Use Puma as the app server
 gem 'puma', '~> 4.1'
 # Use SCSS for stylesheets
@@ -31,6 +29,8 @@ gem 'bootsnap', '>= 1.4.2', require: false
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
   gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
+  # Use sqlite3 as the database for Active Record
+  gem 'sqlite3', '~> 1.4'
 end
 
 group :development do
@@ -50,5 +50,9 @@ group :test do
   gem 'webdrivers'
 end
 
+group :production do
+  gem 'pg', '~> 1.2', '>= 1.2.3'
+end
+
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

Gemfile.lock

@@ -101,6 +101,7 @@ GEM
     nio4r (2.5.2)
     nokogiri (1.10.9)
       mini_portile2 (~> 2.4.0)
+    pg (1.2.3)
     public_suffix (4.0.5)
     puma (4.3.5)
       nio4r (~> 2.0)
@@ -203,6 +204,7 @@ DEPENDENCIES
   capybara (>= 2.15)
   jbuilder (~> 2.7)
   listen (~> 3.2)
+  pg (~> 1.2, >= 1.2.3)
   puma (~> 4.1)
   rails (~> 6.0.3, >= 6.0.3.2)
   sass-rails (>= 6)