Add initial database and configuration

#63 (closed)

To use for now until integrated, open irb and:

require 'sequel'

DATABASE = {
  user: ENV.fetch("POSTGRESQL_USERNAME"),
  password: ENV.fetch("POSTGRESQL_PASSWORD"),
  host: ENV.fetch("POSTGRESQL_HOST"),
  port: ENV.fetch("POSTGRESQL_PORT"),
  database: ENV.fetch("POSTGRESQL_DATABASE"),
  adapter: "postgres"
}.freeze

db = Sequel.connect(DATABASE)

media_resources = db[:media_resources]

media_resources.count

media_resources.insert(....)