rebar.config

{deps, [{cowboy, "2.8.0"},
        {syn,"2.1.1"},
        {nitro, "7.4.1"},
        {n2o,"8.12.1"},
        {kvs, "9.4.2"}]}.

{relx, [{release, {sample, "0.7.0"},[sample]},
        {dev_mode, false},
        {sys_config, "sys.config"},
        {vm_args, "vm.args"},
        {include_erts, true},
        {extended_start_script, true}]}.

{shell,[{config, "sys.config"},
        {apps, [sample]}]}.

{dialyzer, [
  {plt_apps, top_level_deps}
]}.

{project_plugins, [rebar3_format]}.
{format, [
    {files, ["src/*.erl", "test/*.erl"]},
    {formatter, otp_formatter},
    {options, #{ line_length => 108,
                 paper => 250,
                 spaces_around_fields => false,
                 inlining => all,
                 inline_clause_bodies => true,
                 inline_expressions => true,
                 inline_qualified_function_composition => true,
                 inline_simple_funs => true,
                 inline_items => all,
                 inline_fields => true,
                 inline_attributes => true
                 }}]}.