use Mix.Config config :chess, Chess.Endpoint, load_from_system_env: true, url: [host: "example.com", port: 80], cache_static_manifest: "priv/static/cache_manifest.json" config :chess, Chess.Endpoint, server: true, secret_key_base: "${SECRET_KEY_BASE}" config :chess, Chess.Repo, adapter: Ecto.Adapters.Postgres, url: "${DATABASE_URL}", database: "", ssl: true, pool_size: 1