Config database.yml from Rails 5 with Postgres for development

database.yml

# PostgreSQL. Versions 9.1 and up are supported.

default: &default
  adapter: postgresql
  encoding: unicode
  # For details on connection pooling, see Rails configuration guide
  # http://guides.rubyonrails.org/configuring.html#database-pooling
  host: localhost
  database: development
  pool: <%= ENV.fetch("RAILS_MAX_THREADS") { 5 } %>
  username: ror
  password: ultrasecret

development:
  <<: *default
  database: development


test:
  <<: *default
  database: test


production:
  <<: *default
  database: production
  username: ror
  password: <%= ENV['ROR_DATABASE_PASSWORD'] %>