postgres setup via dotenv

.gitignore

@@ -7,10 +7,6 @@
 # Ignore bundler config.
 /.bundle
 
-# Ignore the default SQLite database.
-/db/*.sqlite3
-/db/*.sqlite3-journal
-
 # Ignore all logfiles and tempfiles.
 /log/*
 /tmp/*
@@ -25,3 +21,6 @@
 
 # Ignore master key for decrypting credentials and more.
 /config/master.key
+
+# Ignore environment files
+.env

Gemfile

@@ -6,7 +6,7 @@ gem 'rails', '~> 5.2.1'
 gem 'puma', '~> 3.11'
 gem 'pg'
 gem 'bootsnap', '>= 1.1.0', require: false
-
+gem 'dotenv-rails'
 gem 'distribution'
 
 group :development, :test do

Gemfile.lock

@@ -50,6 +50,10 @@ GEM
     concurrent-ruby (1.0.5)
     crass (1.0.4)
     distribution (0.7.3)
+    dotenv (2.5.0)
+    dotenv-rails (2.5.0)
+      dotenv (= 2.5.0)
+      railties (>= 3.2, < 6.0)
     erubi (1.7.1)
     ffi (1.9.25)
     globalid (0.4.1)
@@ -137,6 +141,7 @@ DEPENDENCIES
   bootsnap (>= 1.1.0)
   byebug
   distribution
+  dotenv-rails
   listen (>= 3.0.5, < 3.2)
   pg
   puma (~> 3.11)
@@ -149,4 +154,4 @@ RUBY VERSION
    ruby 2.5.1p57
 
 BUNDLED WITH
-   1.16.5
+   1.17.1

config/database.yml

@@ -1,25 +1,23 @@
-# SQLite version 3.x
-#   gem install sqlite3
-#
-#   Ensure the SQLite 3 gem is defined in your Gemfile
-#   gem 'sqlite3'
-#
 default: &default
-  adapter: sqlite3
-  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
+  adapter: postgresql
+  encoding: unicode
+  username: <%= ENV['POSTGRES_USER'] %>
+  password: <%= ENV['POSTGRES_PASSWORD'] %>
+  pool: 5
   timeout: 5000
+  host: <%= ENV['POSTGRES_HOST'] %>
 
 development:
   <<: *default
-  database: db/development.sqlite3
+  database: <%= ENV['POSTGRES_DEV_DB'] %>
+  # Warning: The database defined as "test" will be erased and
+  # re-generated from your development database when you run "rake".
+  # Do not set this db to the same as development or production.
 
-# Warning: The database defined as "test" will be erased and
-# re-generated from your development database when you run "rake".
-# Do not set this db to the same as development or production.
 test:
   <<: *default
-  database: db/test.sqlite3
+  database: <%= ENV['POSTGRES_TEST_DB'] %>
 
 production:
   <<: *default
-  database: db/production.sqlite3
+  database: <%= ENV['POSTGRES_LIVE_DB'] %>