Add basic /status endpoint

Also add test for this endpoint

router_test.go

@@ -0,0 +1,22 @@
+package main
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestHandleStatus(t *testing.T) {
+	request, _ := http.NewRequest(http.MethodGet, "/status", nil)
+	response := httptest.NewRecorder()
+
+	HandleStatus(response, request)
+
+	var status RouterStatus
+	json.NewDecoder(response.Body).Decode(&status)
+
+	if status.Ready != true {
+		t.Errorf("got false for /status")
+	}
+}