Is this outdated?

[wktdev]

I downloaded this from Prag Prog and get errors just trying to compile and run it.

`warning: use Mix.Config is deprecated. Use the Config module instead
config/config.exs:11

warning: use Mix.Config is deprecated. Use the Config module instead
config/dev.exs:9

warning: :simple_one_for_one strategy is deprecated, please use DynamicSupervisor instead
(elixir 1.14.3) lib/supervisor.ex:674: Supervisor.init/2
(elixir 1.14.3) lib/supervisor.ex:617: Supervisor.start_link/2
(stdlib 4.2) supervisor.erl:414: :supervisor.do_start_child_i/3
(stdlib 4.2) supervisor.erl:400: :supervisor.do_start_child/2
(stdlib 4.2) supervisor.erl:384: anonymous fn/3 in :supervisor.start_children/2
(stdlib 4.2) supervisor.erl:1250: :supervisor.children_map/4

warning: :simple_one_for_one strategy is deprecated, please use DynamicSupervisor instead
(elixir 1.14.3) lib/supervisor.ex:674: Supervisor.init/2
(elixir 1.14.3) lib/supervisor.ex:617: Supervisor.start_link/2
(stdlib 4.2) supervisor.erl:414: :supervisor.do_start_child_i/3
(stdlib 4.2) supervisor.erl:400: :supervisor.do_start_child/2
(stdlib 4.2) supervisor.erl:384: anonymous fn/3 in :supervisor.start_children/2
(stdlib 4.2) supervisor.erl:1250: :supervisor.children_map/4

warning: Supervisor.start_child/2 with a list of args is deprecated, please use DynamicSupervisor instead
(elixir 1.14.3) lib/supervisor.ex:906: Supervisor.start_child/2
(db_connection 2.0.5) lib/db_connection/watcher.ex:21: DBConnection.Watcher.handle_call/3
(stdlib 4.2) gen_server.erl:1149: :gen_server.try_handle_call/4
(stdlib 4.2) gen_server.erl:1178: :gen_server.handle_msg/6
(stdlib 4.2) proc_lib.erl:240: :proc_lib.init_p_do_apply/3

20:52:57.549 [error] GenServer #PID<0.220.0> terminating
** (stop) {{:case_clause, []}, []}
Last message: nil
State: Postgrex.Protocol
** (Mix) The database for MusicDB.Repo couldn't be created: killed`