Initial Rails test app

config/database.yml

@@ -0,0 +1,20 @@
+default: &default
+  adapter: mysql2
+  encoding: utf8mb4
+  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
+  username: <%= ENV.fetch("DB_USERNAME") { "root" } %>
+  password: <%= ENV.fetch("DB_PASSWORD") { "" } %>
+  host: <%= ENV.fetch("DB_HOST") { "localhost" } %>
+  port: <%= ENV.fetch("DB_PORT") { 3306 } %>
+
+development:
+  <<: *default
+  database: rails_test_development
+
+test:
+  <<: *default
+  database: rails_test_test
+
+production:
+  <<: *default
+  database: <%= ENV.fetch("DB_NAME") { "rails_test_production" } %>