Add a health endpoint

lib/chronoscope_web/controllers/api/v1/health_controller.ex

@@ -0,0 +1,7 @@
+defmodule ChronoscopeWeb.API.V1.HealthController do
+  use ChronoscopeWeb, :controller
+
+  def get(conn, _params) do
+    json(conn, %{healthy: true})
+  end
+end

lib/chronoscope_web/router.ex

@@ -20,6 +20,12 @@ defmodule ChronoscopeWeb.Router do
     get "/", PageController, :home
   end
 
+  scope "/api/v1", ChronoscopeWeb.API.V1 do
+    pipe_through :api
+
+    get "/health", HealthController, :get
+  end
+
   scope "/api/v1/nts", ChronoscopeWeb.API.V1.NTS do
     pipe_through :api
 

test/chronoscope_web/controllers/api/v1/health_controller_test.exs

@@ -0,0 +1,12 @@
+defmodule ChronoscopeWeb.API.V1.HealthControllerTest do
+  use ChronoscopeWeb.ConnCase, async: true
+
+  test "indicates health", %{conn: conn} do
+    response =
+      conn
+      |> get(~p"/api/v1/health")
+      |> json_response(200)
+
+    assert %{"healthy" => true} == response
+  end
+end