Refactor structure

src/handlers/admin/admin_handler_health.erl

@@ -0,0 +1,15 @@
+-module(admin_handler_health).
+
+-export([init/2]).
+
+init(Req, _Opts) ->
+  case cowboy_req:method(Req) of
+    <<"GET">> ->
+      Body = jsx:encode(#{status => <<"ok">>}),
+      Req1 = cowboy_req:reply(200, #{<<"content-type">> => <<"application/json">>}, Body, Req),
+      {ok, Req1, []};
+    _ ->
+      Body = jsx:encode(#{error => <<"Method not allowed">>}),
+      Req1 = cowboy_req:reply(405, #{<<"content-type">> => <<"application/json">>}, Body, Req),
+      {ok, Req1, []}
+  end.