feat(api): new api logic for OPTIONS /version

this api will be the health check api, with the success health check will be return the application version and the runtime version

lib/blogservice_web/controllers/version_controller.ex

@@ -2,18 +2,19 @@ defmodule BlogserviceWeb.VersionController do
   use BlogserviceWeb, :controller
 
   def version(conn, _params) do
-    runtime_elixir = Application.spec(:elixir, :vsn) |> List.to_string()
-    runtime_application = Application.spec(:blogservice, :vsn) |> List.to_string()
+    runtime_elixir = Application.spec(:elixir, :vsn)
+    runtime_application = Application.spec(:blogservice, :vsn)
+    runtime_phoenix = Application.spec(:phoenix, :vsn)
 
-    # conn
-    # |> response(:ok,
-    #   data: %{
-    #     runtime: %{
-    #       elixir: runtime_elixir,
-    #       otp: runtime_application
-    #     }
-    #   }
-    # )
-    conn |> response(:ok)
+    conn
+    |> response(:ok,
+      data: %{
+        runtime: %{
+          elixir: to_string(runtime_elixir),
+          phoenix: to_string(runtime_phoenix),
+          api: to_string(runtime_application)
+        }
+      }
+    )
   end
 end