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Notes

In Gemfile comment out # gem 'sqlite3', '~> 1.3.6' and add gem 'pg'.

Put this in database.yml:

default: &default
  host: localhost
  adapter: postgresql
  encoding: unicode
  pool: 5
  username: postgres
  password: postgres

development:
  <<: *default
  database: mycontacts_development

test:
  <<: *default
  database: mycontacts_test

production:
  <<: *default
  database: mycontacts_production

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