message: improved error message on load unknown template
diff: @@ -16,7 +16,12 @@ export default class TemplateEngine {
  }
  async load(path) {
  + try {
  const content = await Deno.readTextFile(path);
  return parseFrontmatter(content);
  + } catch (err) {
  + console.error(`Error loading the template ${path}`);
  + console.error(err);
  + }
  }
  }
  