Реализация Page и DataCardWidget

api/config/database.yml

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+# PostgreSQL. Versions 9.3 and up are supported.
+#
+# Install the pg driver:
+#   gem install pg
+# On macOS with Homebrew:
+#   gem install pg -- --with-pg-config=/usr/local/bin/pg_config
+# On Windows:
+#   gem install pg
+#       Choose the win32 build.
+#       Install PostgreSQL and put its /bin directory on your path.
+#
+# Configure Using Gemfile
+# gem "pg"
+#
+default: &default
+  adapter: postgresql
+  encoding: unicode
+  host: <%= ENV.fetch("DATABASE_HOSTNAME") { "localhost" } %>
+  port: <%= ENV.fetch("DATABASE_PORT") { 5432 }.to_i %>
+  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
+  username: <%= ENV.fetch("DATABASE_USERNAME") { "postgres" } %>
+  password: <%= ENV.fetch("DATABASE_PASSWORD") { "postgres" } %>
+
+development:
+  <<: *default
+  database: app_development
+
+production:
+  <<: *default
+  database: app_production