add health endpoints

lib/policy_service_web/controllers/health_controller.ex

@@ -0,0 +1,15 @@
+defmodule PolicyServiceWeb.HealthController do
+  use PolicyServiceWeb, :controller
+
+  def health(conn, _params) do
+    conn
+    |> put_status(:ok)
+    |> json(%{status: "ok"})
+  end
+
+  def ready(conn, _params) do
+    conn
+    |> put_status(:ok)
+    |> json(%{status: "ready"})
+  end
+end

lib/policy_service_web/router.ex

@@ -2,6 +2,7 @@ defmodule PolicyServiceWeb.Router do
   use PolicyServiceWeb, :router
 
   alias PolicyServiceWeb.PolicyController
+  alias PolicyServiceWeb.HealthController
 
   pipeline :api do
     plug OpenApiSpex.Plug.PutApiSpec, module: PolicyServiceWeb.ApiSpec
@@ -10,6 +11,9 @@ defmodule PolicyServiceWeb.Router do
   scope "/api" do
     pipe_through [:api]
 
+    get "/health", HealthController, :health
+    get "/health/ready", HealthController, :ready
+
     get "/openapi", OpenApiSpex.Plug.RenderSpec, []
 
     scope "/v1" do