postgres host

config/test.exs

@@ -29,7 +29,7 @@ config :tradex, Tradex.Mailer, adapter: Swoosh.Adapters.Test
 config :tradex, Tradex.Repo,
   username: "postgres",
   password: "postgres",
-  hostname: "localhost",
+  hostname: if(System.get_env("CI") == "true", do: "postgres", else: "localhost"),
   database: "tradex_test#{System.get_env("MIX_TEST_PARTITION")}",
   pool: Ecto.Adapters.SQL.Sandbox,
   # We don't run a server during test. If one is required,